化学
化学反応、化学量論、分子構造、元素の性質。
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which of the following is true of iron? a. it has the highest electrica…
B. It can exist in many alloys, usually with a carbon base.
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question 9 (1 point) a system has reached chemical equilibrium. which i…
a) there is no net change in the concentration of reactants or products
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question 8 (1 point) which is true of the numerical value of the equili…
a) It represents the relative concentration of products compared with reactants.
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question 7 (1 point) if $q_{eq} > k_{eq}$, then ______. a) the ratio of…
b) the ratio of products to reactants is greater than \(K_{eq}\)
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question 6 (1 point) use the following information to answer the next q…
c) \( K_{\text{eq}} = \frac{[\ce{ClO_3^-}]^2 [\ce{Cl^-}]}{[\ce{ClO_2^-}]^3} \)
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a chemistry student in lab needs to fill a temperature - control tank w…
2.31
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question 5 (1 point) which of these affects the equilibrium constant, $…
d) temperature
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question 4 (1 point) how many hydrogen ions must be added to the half r…
e) 4 on the left side
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question 3 (1 point) identify the reducing agent in the reaction: $\\ce…
b) \( \text{Sn}^{2+}(\text{aq}) \)
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question 2 (1 point) in the reaction: $\\ce{kno_{3}(aq) + pbso_{4}(aq) …
e) there is no reducing agent
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question 1 (1 point) what is the correct balanced redox reaction for $m…
e) \( 3\text{Zn}^{2+}(aq) + 2\text{Al}(s) ightarrow 3\text{Zn}(s) + 2\text{Al}^{3+}(aq) \)
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short answer questions answer the following short answer questions abou…
1. Sodium loses its single valence electron to become a positively charged cation ($\text{Na}^+$), while chlorine gains this electron to become a negatively charged anion ($\text{…
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which phrase defines altitude? how tightly molecules are packed a colum…
D. the height of a given point above sea level
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2 multiple choice 1 point which phrase describes a physical process tha…
D. Movement of air masses transfers heat from one region to another.
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when a dog eats its dinner, it converts ____ ______ from the food into …
Chemical Energy
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5. a natural gas stove converts chemical energy from burning into therm…
C. Transformation
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9. a natural gas stove converts chemical energy from burning into therm…
B. Mechanical Energy
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5. a natural gas stove converts chemical energy from burning into therm…
Thermal energy (the option corresponding to "Thermal energy" among the choices, likely the last option: "Thermal energy")
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5. a natural gas stove converts chemical energy from burning into therm…
C. Energy cannot be created or destroyed (assuming the third option is labeled C; if the original options have different labels, adjust accordingly to match the option text "Energ…
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balanced or unbalanced? determine whether or not the equation is balanc…
1. U 2. U 3. U 4. B 5. B 6. U 7. B 8. B
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name: date: period: counting atoms task cards directions: using the che…
- Number of oxygen atoms: 2 - Total number of atoms: 2
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name: date: period: counting atoms task cards directions: using the che…
- Nitrogen (N): 1 atom - Hydrogen (H): 4 atoms - Total atoms: 5
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name: date: period counting atoms task cards directions: using the chem…
- Ca: 1 atom - N: 2 atoms - O: 6 atoms - Total atoms: 9
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counting atoms task cards directions: using the chemical formula cards,…
- Aluminum (Al): 2 atoms - Sulfur (S): 3 atoms - Oxygen (O): 12 atoms - Total atoms: 17 Note: The formula for card 14 is cut off, so only card 13 ($Al_2(SO_4)_3$) can be solved wi…
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i organic chemistry: 3. draw structural, condensed or line structural d…
### 1. 3 - ethylhexan - 2 - ol #### Step 1: Identify the parent chain The parent chain is hexane, which has 6 carbon atoms. So the carbon skeleton of the parent chain is \( \text{…
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15. complete the ground state orbital - filling diagram and write the c…
s: a. $\boldsymbol{9}$ electrons. b. Element X is $\boldsymbol{\text{Fluorine (F)}}$, electron configuration: $\boldsymbol{1s^2 2s^2 2p^5}$
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what types of substances can be poured down a drain and rinsed with lar…
D. No chemicals at all!!
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are different forms of the same element and can provide clues about env…
I agree with the idea that using almost every part of the science payload (like SAM) to examine the Martian drift is a good approach for thorough scientific exploration, and that …
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2. a) draw the (horizontal) orbital diagram of gallium (ga). b) what ch…
(a): The orbital diagram for Ga is: \(1s\): \(\uparrow\downarrow\) \(2s\): \(\uparrow\downarrow\) \(2p\): \(\uparrow\downarrow\ \uparrow\downarrow\ \uparrow\downarrow\) \(3s\): \(…
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when moving from left to right across a period,the outer electrons feel…
a. Stronger, decreases
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the function of a biosafety cabinet is to exhaust chemical fumes out of…
True
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the atomic radius of aluminum is greater than ______. a thallium b gall…
c. Boron
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guiding question: how does a balanced equation demonstrate the law of c…
## Reasoning: A balanced chemical equation demonstrates the law of conservation of mass by ensuring the total number of each type of atom is identical on both the reactant and pro…
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \( 2F_2(g) + O_2(g) ightarrow 2OF_2(g) \)
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \( 2F_2(g) + O_2(g) ightarrow 2OF_2(g) \)
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background engage: making sense of milk in this activity, you will wond…
1. a. Water, lactose, fats, casein, calcium, vitamins b. Scattered light from proteins/fat globules c. Particles scatter all visible light wavelengths d. No; varies by animal/proc…
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4) check if each statement describes an alkali metal, an alkaline earth…
### Part 4) Checkbox Matches: | Statement | Transition Metal | Alkali Metal | Alkaline Earth Metal | |-----------|------------------|--------------|----------------------| | inclu…
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10) drag and drop the answers for the orbital diagram for nitrogen. ref…
1s: $\boldsymbol{\uparrow\downarrow}$ 2s: $\boldsymbol{\uparrow\downarrow}$ 2p: $\boldsymbol{\uparrow}$ $\boldsymbol{\uparrow}$ $\boldsymbol{\uparrow}$ 3s: (empty) 3p: (empty)
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13) choose all that apply. refer to the periodic table. what sublevels …
13) - $\square$ p - $\square$ d - $\square$ s - $\square$ f (unselected) 14) Orbital diagram filled as: - 1s: $\boldsymbol{\uparrow\downarrow}$ - 2s: $\boldsymbol{\uparrow\downarr…
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15) choose the best answer. refer to the periodic table. what is the el…
## Question 15: $\boldsymbol{1s^22s^22p^63s^23p^64s^23d^{10}4p^2}$ ## Question 16: $\boldsymbol{[Ar] 4s^23d^{10}4p^2}$
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17) choose the correct electron configuration for the element. refer to…
17. $1s^2$ 18. $[Xe] 6s^24f^{14}5d^{10}6p^4$
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19) choose the correct electron configuration for the element. refer to…
19) [Ar] 4s²3d¹⁰ 20) [Ar] 4s²3d⁶
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13) choose all that apply. refer to the periodic table. what sublevels …
13) - $\square$ p - $\square$ d - $\square$ s - $\square$ f (unselected) 14) Orbital diagram filled as: - 1s: $\boldsymbol{\uparrow\downarrow}$ - 2s: $\boldsymbol{\uparrow\downarr…
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what is the electron configuration for nitrogen? 1s²2s²2p³ 1s²2s²2p⁶3s²…
1. Multiple choice answer: $\boldsymbol{1s^22s^22p^3}$ 2. How many electrons does germanium have? $\boldsymbol{32}$ 3. What period is germanium in? $\boldsymbol{4}$ 4. How many en…
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9) choose all that apply. refer to the periodic table. what two subleve…
□ s □ p
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8) type the correct answers in the blanks. refer to the periodic table.…
8) - How many electrons does nitrogen have? 7 - What period is nitrogen in? 2 - How many energy levels does nitrogen have? 2 9) - $\square$ s - $\square$ p - $\square$ f - $\squar…
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7) drag and drop the electron configurations to the elements. refer to …
- $1s^22s^22p^63s^23p^5$ → Cl - $1s^22s^22p^3$ → N - $1s^22s^22p^63s^23p^1$ → Al - $1s^22s^22p^63s^23p^64s^23d^{10}$ → Zn
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5) choose the best answer. which of these elements can be used to write…
5. Ar 6. atomic number
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3) choose the best answer. which rule states that orbitals of equal ene…
3. B. Hund's rule 4. B. Pauli exclusion principle
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1) choose the best answer. what is electron configuration? the outermos…
1. the arrangement of electrons in an atom 2. Aufbau principle
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evaluation continue n°1 de physique chimie coef: 3 la qualité de la réd…
### Partie I : Physique (Questions de cours) #### 1. Définitions - **Force** : Action capable de modifier l'état de mouvement (vitesse, direction) ou la forme d'un objet. - **Dyna…
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7. which of the following statements describes the term concentration? …
d. Two of the above describe the term concentration. ### Question 8
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chemistry 11 sch3u test 4 – solutions and solubility name:_____________…
a. \( \text{Ca(OH)}_{2(\text{s})} ightarrow \text{Ca}^{2+}_{(\text{aq})} + 2\text{OH}^-_{(\text{aq})} \) ### Question 2
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14) choose the best answer. (see companion material, the periodical tab…
14) D. 14 15) B. Ca
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11) choose the best answer. (see companion material, the periodical tab…
11. Co 12. Nd 13. 5
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9) choose the best answer. which sublevels are found in the 4th energy …
9. s, p, d, and f 10. a. 2 b. 8 c. 18 d. 32
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7) choose the best answer. how do you determine the number of energy le…
7. It is the same number as the period number. 8. 7
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3) choose the best answer using a periodic table. (see companion materi…
The third option (the structure with 7 dots around the Cl symbol: 2 dots top, 2 dots right, 2 dots bottom, 1 dot left)
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1) choose the best answer. elements in a group have similar properties …
1. valence electrons 2. It is the same number as the last digit of the group number.
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \(2 \text{F}_2(\text{g}) + \text{O}_2(\text{g}) ightarrow 2 \text{OF}_2(\text{g})\)
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \(2 \text{F}_2(\text{g}) + \text{O}_2(\text{g}) ightarrow 2 \text{OF}_2(\text{g})\)
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \( \ce{2F2(g) + O2(g) -> 2OF2(g)} \)
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \( \ce{2 F2(g) + O2(g) → 2 OF2(g)} \)
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \( \ce{2 F2(g) + O2(g) → 2 OF2(g)} \)
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \( 2 F_2(g) + O_2(g) ightarrow 2 OF_2(g) \)
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $\boldsymbol{2F_2(g) + O_2(g) ightarrow 2OF_2(g)}$
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. \(2 F_2(g) + O_2(g) ightarrow 2 OF_2(g)\)
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1. what are the four major sources of energy harnessed by engines? 2. e…
The four major sources of energy harnessed by engines are typically chemical energy (from fuels like gasoline, diesel, coal, etc.), thermal energy (heat, e.g., from steam), mechan…
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practice: 1. read the following scales. record the correct number of di…
First Thermometer: $45.7^\circ \text{C}$ Second Thermometer: $21.0^\circ \text{C}$ (or $21.05^\circ \text{C}$ if the divisions are 0.05, but likely 21.0) Third Thermometer: $100.1…
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crystals 6. what are crystals? crystals are solid materi arranged in a …
Crystals are solid materials in which atoms, molecules, or ions are arranged in a highly ordered, repeating three - dimensional lattice structure.
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what volume in liters of a 0.724 m nai solution contains 0.405 mol of n…
0.559 liters (Factor setup for the diagram: Starting amount: \( 0.405 \) mol NaI Multiplication factor: \( \frac{1\ \text{L}}{0.724\ \text{mol NaI}} \))
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determine the amount in grams of kcl that exists in 20.3 g of a solutio…
$0.231\ \text{g KCl}$ (The filled setup would be: Starting amount: $20.3$ $\text{g solution}$ Multiplied by $\frac{1.14\ \text{g KCl}}{100\ \text{g solution}}$)
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the purpose of an electric motor is to convert ______. choose 1 answer:…
A. electrical energy into kinetic energy
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how many grams of a solution that is 5.20 % sucrose by mass are needed …
346 g solution
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what is the molarity of potassium ions in a 0.122 m k₂cro₄ solution?
$0.244\ \text{M } K^+$
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here is the reaction you drew for protonation of methanol with an acid.…
1. Protonation of methanol first occurs: $CH_3OH + H^+ ightarrow CH_3OH_2^+$ 2. A second methanol molecule (as nucleophile) attacks the oxonium ion, leading to elimination of $H_2…
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5. which process is necessary to the formation of clouds? (options: war…
(Assuming the correct option is related to condensation, e.g., if options are A. evaporation, B. precipitation, C. condensation, D. transpiration, then) C. condensation ### Questi…
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in the boxes, draw the structures, including all bonds, lone pairs and …
Left box structure: ``` H | H - C - O:⁻ | H ``` (Plus a separate $\text{H}^+$; oxygen has 3 lone pairs, negative charge) Right box structure: ``` H | H - C⁺ - O - H | H ``` (Oxyge…
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which is a nonpoint source of pollution? ○ tourists throw trash into th…
C. Rain contains chemicals that seep into the ground.
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a particular antibiotic kills 99% of a bacterial population. what will …
## Part E Over time, the antibiotic will become less effective at killing the bacteria ## Part F The use of any chemical that kills bacteria can eventually lead to resistance to t…
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draw a skeletal (\line\) structure of this molecule: $\\ce{ch3 - c(=o) …
The skeletal (line) structure of the molecule is: ``` CH₃ | O | O ║ | ║ C - C - C - C - CH₃ | CH - CH₃ | CH₃ ``` (Or in a more compact and standard drawing: ``` CH3 | O | O || | |…
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how many different molecules are drawn below? (with molecular structure…
4
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background engage: making sense of milk in this activity, you will wond…
1. a. Water, lactose, fats, casein, calcium, vitamins b. Scattered light from proteins/fat globules c. Particles scatter all visible light wavelengths d. No; varies by animal/proc…
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4) check if each statement describes an alkali metal, an alkaline earth…
### Part 4) Checkbox Matches: | Statement | Transition Metal | Alkali Metal | Alkaline Earth Metal | |-----------|------------------|--------------|----------------------| | inclu…
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10) drag and drop the answers for the orbital diagram for nitrogen. ref…
1s: $\boldsymbol{\uparrow\downarrow}$ 2s: $\boldsymbol{\uparrow\downarrow}$ 2p: $\boldsymbol{\uparrow}$ $\boldsymbol{\uparrow}$ $\boldsymbol{\uparrow}$ 3s: (empty) 3p: (empty)
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15) choose the best answer. refer to the periodic table. what is the el…
## Question 15: $\boldsymbol{1s^22s^22p^63s^23p^64s^23d^{10}4p^2}$ ## Question 16: $\boldsymbol{[Ar] 4s^23d^{10}4p^2}$
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17) choose the correct electron configuration for the element. refer to…
17. $1s^2$ 18. $[Xe] 6s^24f^{14}5d^{10}6p^4$
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19) choose the correct electron configuration for the element. refer to…
19) [Ar] 4s²3d¹⁰ 20) [Ar] 4s²3d⁶
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13) choose all that apply. refer to the periodic table. what sublevels …
□ p □ d □ s $\square$ f
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what is the electron configuration for nitrogen? 1s²2s²2p³ 1s²2s²2p⁶3s²…
1. Multiple choice answer: $\boldsymbol{1s^22s^22p^3}$ 2. How many electrons does germanium have? $\boldsymbol{32}$ 3. What period is germanium in? $\boldsymbol{4}$ 4. How many en…
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9) choose all that apply. refer to the periodic table. what two subleve…
□ s □ p
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8) type the correct answers in the blanks. refer to the periodic table.…
8) - How many electrons does nitrogen have? 7 - What period is nitrogen in? 2 - How many energy levels does nitrogen have? 2 9) - $\square$ s - $\square$ p - $\square$ f - $\squar…
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7) drag and drop the electron configurations to the elements. refer to …
- $1s^22s^22p^63s^23p^5$ → Cl - $1s^22s^22p^3$ → N - $1s^22s^22p^63s^23p^1$ → Al - $1s^22s^22p^63s^23p^64s^23d^{10}$ → Zn
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5) choose the best answer. which of these elements can be used to write…
5. Ar 6. atomic number
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3) choose the best answer. which rule states that orbitals of equal ene…
3. B. Hund's rule 4. B. Pauli exclusion principle
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1) choose the best answer. what is electron configuration? the outermos…
1. the arrangement of electrons in an atom 2. Aufbau principle
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evaluation continue n°1 de physique chimie coef: 3 la qualité de la réd…
### Partie I : Physique (Questions de cours) #### 1. Définitions - **Force** : Action capable de modifier l'état de mouvement (vitesse, direction) ou la forme d'un objet. - **Dyna…
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7. which of the following statements describes the term concentration? …
d. Two of the above describe the term concentration. ### Question 8
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chemistry 11 sch3u test 4 – solutions and solubility name:_____________…
a. \( \text{Ca(OH)}_{2(\text{s})} ightarrow \text{Ca}^{2+}_{(\text{aq})} + 2\text{OH}^-_{(\text{aq})} \) ### Question 2
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14) choose the best answer. (see companion material, the periodical tab…
14) D. 14 15) B. Ca