化学
化学反応、化学量論、分子構造、元素の性質。
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organic foods tend to have higher levels of nutrients than nonorganic f…
F
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which of the following represents an inorganic molecule? sucrose choles…
sodium chloride
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question 16 (5 points) fill in the symbol, mass, protons, neutrons, ele…
Blank 1: Xe Blank 2: 131 Blank 3: 54 Blank 4: 77 Blank 5: 54
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the number of protons in an atom can be determined by _____ adding the …
C. the element's atomic number
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two atoms that share electrons but have unequal attraction for electron…
A. polar covalent bonds
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isotopes the number of in a nucleus determines the identity of the elem…
1. An atom of an element with the same number of protons but a different number of neutrons, having the same atomic number but a different atomic mass. 2. The mass number, which i…
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28. c 29. f 30. neon counting atoms 31. 5 cacl₂ 32. 12 co 33. 16 2na₃po…
34. 7 35. 60
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question 14 (1 point) fill in the symbol, mass, protons, neutrons, elec…
Symbol: K Mass: 39 Protons: 19 Neutrons: 20 Electrons: 19
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question 13 (5 points) fill in the symbol, mass, protons, neutrons, ele…
Blank 1: Ti Blank 2: 48 Blank 3: 22 Blank 4: 26 Blank 5: 22
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unscramble the letters to form a medical term from the clues. use the l…
1. megaly 2. lysis 3. ischemia 4. otalgia 5. myoma 6. acute Bonus term: multiple myeloma
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5. hardening of the arteries caused by a collection of plaque is called…
5. Atherosclerosis; Ischemia; Coronary angiography 6. Laparoscopy; Cholecystectomy 7. Myeloma 8. Salpingo - oophorectomy; Hysterectomy 9. Meningitis 10. Hematuria; Cystitis
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answer the following questions about each macromolecule. molecule #4 13…
13. Carbohydrate 14. Monosaccharide 15. Hydrolysis 16. A primary source of energy
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8. which of the following should not be disposed of in regular trash? a…
a) Paper towels with chemical spills
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evaluating an audio source quiz complete 1 2 3 4 read the scenario. mon…
farmers looking into organic growing practices
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bond #3 9. what molecule/compound do the atoms above make when bonded t…
9. Methane ($CH_4$) 10. Covalent 11. 4 12. 6
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5. what molecule/compound do the two atoms make when bonded together? 6…
5. Sodium chloride (NaCl) 6. Ionic 7. Sodium (Na) 8. Nonmetal
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1. what molecule/compound do the atoms above make when bonded together?…
1. $H_2O$ 2. Covalent 3. 6 4. 1
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1. what molecule/compound do the atoms above make when bonded together?…
1. $H_2O$ 2. Covalent 3. 6 4. 1
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which small molecule neurotransmitter is involved in memory and movemen…
C. Acetylcholine
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below is the first sentence of a paragraph taken from a report by frank…
I would expect the rest of the paragraph to explain the process of what causes the popcorn kernel to jump in the air as it pops.
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question completion status: which characteristic of water contributes m…
C. Water has a high specific heat. A. an acid. C. Isomers.
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question 5 in this picture, the letters a and b represent, respectively…
D. covalent bonds and hydrogen bonds
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question 4 a covalent bond is formed by the sharing of ______ between a…
D. electrons; transfer of electrons from one atom to another (No answer for Q5 as options not provided)
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what physical and chemical changes occur when making a smore? what come…
Physical changes: melting chocolate, breaking graham crackers. Chemical changes: toasting marshmallow, browning chocolate.
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question completion status: an atom that is neutrally charged contains …
1. C. the same number of protons and electrons. 2. A. The same number of protons but different number of neutrons. 3. C. Electron
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phase 1: identify information provided by the periodic table of element…
1. Oxygen: Atomic number 8, group 16, period 2, symbol O, atomic mass ~16.00. 2. Essential - element groups: Groups 1, 2, 14, 15, 16, 17 with various biological functions. 3. Nitr…
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down’s syndrome is one organic cause of an intellectual disability. ple…
T
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the curved surface in a graduated cylinder is called a ___________. esc…
menisco
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according to the periodic table, which of these elements has the most e…
B. rubidium (Rb)
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the halogens are the elements of group 17 on the periodic table. haloge…
B. salt
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the elements found in family 1 of the periodic table are so soft that t…
D. they produce extreme heat when mixed with water
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directions: select the correct answer from each drop - down menu. verti…
First drop - down menu: Groups (or Families) Second drop - down menu: Similar chemical properties
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according to the periodic table, which of these elements has atoms with…
B. argon (Ar)
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3. the molten rock that erupts onto the surface of the earth is called …
3. A. lava 4. C. water, dissolved gases, and molten materials
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atoms that have the same number of valence electrons in their outer she…
B. belong to the same family of elements
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transition metals can be found in families 3 through 12 on the periodic…
A. they are rarely found as single elements in nature
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when a highly reactive metal, such as lithium (li), is mixed with a hig…
C. Fluorine (F)
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ions of the elements oxygen (o), sulfur (s), and selenium (se) usually …
A. elements in the same group share certain properties, and each group has unique properties
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why is helium less reactive than hydrogen? a. each helium atom has a fu…
D. Each helium atom has a full valence electron shell, but each hydrogen atom only has one valence electron
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the noble gases include helium, neon, argon, krypton, xenon, and radon.…
B. They are normally unreactive with other elements.
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as the period number increases on the periodic table (moving from the t…
C. the number of the energy level containing the valence electrons increases
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along each row of the periodic table, a. atomic mass is the same for al…
C. atomic mass increases from left to right
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four groups are highlighted in the periodic table below. select the gro…
The group with elements F, Cl, Br, I, etc. (group 17)
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what is the lewis diagram for fluorine, f₂? (note: just fill in the das…
6
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directions: drag each element to the correct location in the periodic t…
S should be placed in the empty space in Group 16, Period 3. Ge should be placed in the empty space in Group 14, Period 4. Cd should be placed in the empty space in Group 12, Peri…
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21. the carbon cycle includes two main categories of processes. some th…
A. A reduction in the consumption of fossil fuels
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helium (he), neon (ne) and argon (ar) are all colorless, odorless gases…
C. xenon (Xe)
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based on the periodic table, which of the following groups of elements …
A. lithium (Li), sodium (Na), potassium (K)
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eye protection - wear safety goggles anytime there is a chance you coul…
1. Rinse off in a faucet or safety shower for 5 minutes. 2. Anytime there is a chance you could be harmed, when working with heat, and when working with chemicals. 3. Use with ext…
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an element has a very low boiling point and very low reactivity. where …
D. in the far right column
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which pair of elements from those outlined has the greatest difference …
D. krypton (Kr) and strontium (Sr)
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select the type of model that best represents a chemical reaction. conc…
C. Computer simulation
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which pair of elements from those outlined has the greatest difference …
A pair consisting of an alkali metal and a halogen from the outlined elements would have the greatest difference in chemical properties.
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a new plumbing system needs to be installed in a school bathroom. what …
D. Chemistry helps in selecting materials
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which of the following is an example of a chemical change? melting ice …
B. Burning wood
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categorize each substance as a pure substance or a mixture: soil
B. Mixture
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which of the following is an example of a physical change? freezing wat…
Freezing water
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what is the main difference between a pure substance and a mixture? mix…
B. Pure substances have a fixed composition; mixtures do not.
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categorize each substance as a pure substance or a mixture: air
A. Mixture
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categorize each substance as a pure substance or a mixture: carbon diox…
D. Pure substance
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use your periodic table for reference. identify the abbreviated notatio…
Si
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1. predict: each hydrogen atom has one valence electron, but it needs t…
1. By sharing their valence electrons to form a covalent bond. 2. A covalent bond is formed by sharing electrons between the two hydrogen atoms to create a diatomic molecule of hy…
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which statement helps to explain why ice is less dense than liquid wate…
E. Both (a) and (b)
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though you add heat, the temperature of boiling water remains constant …
it takes energy to break hydrogen bonds.
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which of the following statements, if true, would support the claim tha…
A. The $NO_3^-$ ion is not a polar species.
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part f (6 of 11) which of the following helps most to explain why water…
A. A water molecule can make 4 hydrogen bonds.
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1. how is the process that generates energy in the suns core different …
The energy - generating process in the Sun's core is nuclear fusion, which releases much more energy per reaction than a chemical reaction explosion that involves electron - level…
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water has surface tension because ... water tends to evaporate from the…
hydrogen bonds between surface water molecules resist being stretched.
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which of the following lewis diagrams best represents the bonding in th…
B. $:N\equiv N - \ddot{O}:$
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revisit investigative phenomenon go online to elaborate on and evaluate…
Rather than a simple statement of electron transitions, we can say that in fireworks, specific elements have electrons that undergo quantized energy transitions between well - def…
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part b (2 of 11) 3 tries left dissolving is best described as ... a min…
a mingling of molecules and/or ions.
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overlapping orbitals the individual atomic orbitals in an atom overlap …
1s, 2s, 2p, 3s, 3p, 4s, 3d
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1. the outermost electrons in each atom are called valence electrons. h…
1. 7 2. The left atom becomes a cation and the right atom becomes an anion. 3. The right atom becomes a cation and the left atom becomes an anion.
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the diagram above shows two resonance structures for a molecule of c₆h₆…
A. In the $C_6H_6$ molecule, all the bonds between the carbon atoms have the same length.
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chemistry review - water: properties of water 11 parts | -- of 1 point …
Nonpolar groups repel water.
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measurements show that the ph of a particular lake is 4.0. what is the …
10⁻¹⁰ M
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the elements c and se have the same electronegativity value, 2.55. whic…
B. The carbon - to - selenium bond is nonpolar covalent.
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6. draw a thumbnail sketch of wrights window based on the tulip. make s…
6. Draw a thumbnail sketch of Wright's window with a frame. 7. Interior design for aesthetic and light - filtering.
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the shell model the shell - model of the atom is a simplified version o…
As the shell number increases, the number of sub - shells and orbitals increases, allowing more electrons to be accommodated according to the formula \(2n^{2}\).
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2. 1.00 x 10² g of aluminum and 1.50 x 10² g of oxygen are reacted acco…
i. Theoretical mass of $Al_2O_3$ is approximately $188.9\ g$, actual mass is $132.1\ g$. ii. Mass of $Al$ is $0\ g$, mass of $O_2$ is approximately $61.07\ g$. Percent yield of th…
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1. the bohr model described electrons as orbiting the nucleus in fixed …
1. Orbits 2. Orbital 3. Quantum numbers 4. Electron - configuration 5. Aufbau 6. Singly 7. Quantum numbers 8. Valence 9. Valence 10. Octet
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two pure elements react to form a compound. one element is an alkali me…
C. It contains ionic bonds.
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select the correct answer from each drop - down menu. why are biogeoche…
remains constant
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select the correct answer from each drop - down menu. why are biogeoche…
First drop - down: is finite Second drop - down: recycle
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which of the following scientific claims about the bond in the molecula…
D. The bond is highly polar.
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select the correct answer from each drop - down menu. water is an impor…
First drop - down: Evaporation Second drop - down: Transpiration Third drop - down: Nitrogen - fixing bacteria
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which of the following is a result of chemical weathering? a glacier ca…
- First question: B. Rust forming on a rock - Second question: C. Biosphere
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binding energy (mj/mol) the photoelectron spectrum for an unknown eleme…
The 1s peak of the element (silicon) would appear to the left of the 1s peak of aluminum because silicon has a greater nuclear charge, leading to a higher binding energy for its 1…
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7 multiple choice 1 point how do atoms achieve a full octet in single c…
Two atoms share two electrons.
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the photoelectron spectrum for an unknown element is shown above. (a) b…
The element is Aluminum ($Al$) and its electron - configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$.
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read the lines from shakespeares \sonnet 71.\ nay, if you read this lin…
C. cdcd
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select the correct formula for sulfur hexafluoride. f6s2 f6so3 sf6 s2f6
C. SF₆
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5 multiple choice 1 point which of the following is a covalent compound…
C. PCl₅
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drag each tile to the correct location. in each example, the atmosphere…
Water evaporates in the presence of sunlight: Hydrosphere Volcanoes release a large amount of gases and other matter during eruption: Geosphere Lightning causes nitrogen molecules…
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4 multiple choice 1 point covalent compounds are usually composed of po…
C. composed of two or more nonmetallic elements
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select the correct formula for phosphorus pentachloride. o pcl₅ o cl₅p …
A. $PCl_5$
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multiple choice 1 point which of the following is the correct name for …
dinitrogen pentoxide
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unit 3 quiz: covalent bonding please use your periodic table and refere…
D. tetra-, 4
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the photoelectron spectrum for the element nitrogen is represented abov…
D. The electrons in the 2p sublevel have the smallest binding energy.
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the complete photoelectron spectrum of an element is given above. which…
B. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$