化学
化学反应、化学计量、分子结构与元素性质。
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12) put a checkmark next to matter whether its elements, compounds, or …
Examples: Oxygen (O), Gold (Au): Elements Can be easily separated into individual parts: Mixtures Made of only one type of atom: Elements Examples: Water (H₂O), Carbon dioxide (CO…
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choose two facts about chemical technicians. they can earn a good salar…
They can earn a good salary after earning a two - year degree or certificate. They set up and maintain labs, prepare and test chemical solutions, and prepare reports.
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choose three examples of alloys. brass made of zinc and copper steel ma…
1. brass made of zinc and copper 2. steel made of iron and carbon 3. colored gold made of gold and magnesium
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a mixture of metals is a(n) ____ hybrid fusion admixture alloy
D. alloy
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adding more solute to a solution will ______ the concentration. increas…
A. increase
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__ is the process to weaken or reduce in concentration. empower intensi…
D. Dilution
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____ is a measure of a solute dissolved in a solution. solution concent…
B. Concentration
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7. collect data: beginning with na, record the number of energy levels,…
| Element | Na | Mg | Al | Si | P | S | Cl | Ar | |--|--|--|--|--|--|--|--|--| | Number of energy levels | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | | Number of protons | 11 | 12 | 13 | 14 …
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5) match the definitions with the terms. a substances ability to dissol…
- a substance's ability to dissolve: Solubility - liquid used to dissolve a substance: Solvent - a dissolved substance: Solute - physical combination of substances: Mixture - mixt…
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which two are characteristics of mixtures? each part keeps its properti…
Each part keeps its properties. You usually can easily separate the parts after they are combined.
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what would be the best title for the chart? ?????? - it is uniform, or …
C. Characteristics of a Solution
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what is an example of a mixture? salad salt sugar potassium
A. salad
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a(n) ___ solution is one in which water is the liquid used to dissolve …
A. aqueous
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2. collect data: use the ruler to measure the atomic radii of the group…
3. The atomic radius increases. 4. For elements in the same group, as the number of energy levels increases, the atomic radius increases. 5. The more energy levels an atom has, th…
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3. what is the relationship between the thickness of the book and the a…
1. The radius of hydrogen is 53 pm. 2. The radius of lithium is 167 pm. 3. As the thickness of the book increases, the ability of the magnet to hold on to and attract paper clips …
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part 4 - homework/independent practice 1. what conclusion was a direct …
1. 1) An atom is mostly empty space with a dense, positively charged nucleus. 2. 2) Largely empty space 3. 1) smaller and contains most of the atom’s mass 4. Both models agree tha…
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oil and vinegar salad dressing is a heterogeneous mixture because its c…
4. A compound is a pure substance with elements chemically combined in a fixed ratio, while a mixture has substances not chemically combined and variable composition. 5. A mixture…
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the following would be an example of: 1 - obtain soda water, aspartame …
# Breve explicación: Los pasos enumerados describen cómo llevar a cabo una actividad, especificando cada acción que debe realizarse. Esto corresponde a un procedimiento o conjunto…
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edpuzzle - isotopes & isotope symbols multiple - choice question why is…
because it has 32 neutrons
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slide 7 what type of weathering does each example describe. water disso…
1. Chemical weathering 2. Chemical or physical weathering (more information needed to be certain) 3. Physical weathering 4. Chemical weathering 5. Physical weathering
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edpuzzle - isotopes & isotope symbols multiple - choice question why do…
because it has 6 protons and 8 neutrons.
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8. there are 2850.5 miles between houston, tx and vancouver, canada, si…
$4.5608\times 10^{6}$ m ### 9.
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circle the right answer! some questions have more than one answer! drag…
1. Potential Energy 2. Thermal Energy 3. Nuclear Energy 4. Chemical Energy 5. Velocity
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edpuzzle - isotopes & isotope symbols multiple - choice question we kno…
...have 26 protons ...have an atomic number of 26
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question 7 1 pts slide 6 what is the wearing down of rock through the m…
C. erosion
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fill in the blank: fill in the blanks with the correct vocab term. word…
1. Potential Mechanical 2. Kinetic Mechanical 3. Electrical, Radiant 4. Chemical 5. Nuclear
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question 6 water is made of what two elements? hydrogen and oxygen oxyg…
A. hydrogen and oxygen
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word bank: potential mechanical, chemical, nuclear, kinetic mechanical,…
1. Potential Mechanical 2. Kinetic Mechanical 3. Electrical; Radiant 4. Chemical 5. Nuclear
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question 4 (4 points) questions 3 and 4) identify the independent and d…
Independent Variable: 8. Number of Unpaired Electrons Dependent Variable: 7. Magnetism
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buffering systems have what effect? move ph towards extremes move ph to…
move pH towards neutral
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what happens if you add more carbon dioxide?chemical reactions of carbo…
ocean acidification
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question 9 1 pts water can pile up a short distance above a containers …
high surface tension.
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question 7 1 pts hydrogen bonds form between neighboring water molecule…
the polarity of water molecules.
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question 2 1 pts the overall electrical charge of most atoms is balance…
False
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complete the text with the best transition. some people argue that bott…
In particular
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vocab practice: drag the term into the correct box below. vocabulary te…
Thermal Energy - Energy related to the vibration and movement of particles (heat). Nuclear Energy - Energy stored in the nucleus of an atom. Electrical Energy - Energy from moving…
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9. give the symbol and number of neutrons in one atom of: (to get “mass…
Barium: Symbol $^{137}_{56}Ba$, 81 neutrons Carbon: Symbol $^{12}_{6}C$, 6 neutrons Fluorine: Symbol $^{19}_{9}F$, 10 neutrons Europium: Symbol $^{152}_{63}Eu$, 89 neutrons Bismut…
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8. give the symbol and number of electrons in a neutral atom of: uraniu…
Yes ### For 11b: Different isotopes of the same element can have different numbers of neutrons. So just knowing the number of neutrons is not enough to determine the element.
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10. name the element which has the following numbers of particles: a. 2…
a. Iron (Fe) b. Iodine (I) c. Helium (He) d. Calcium (Ca) e. Lead (Pb) f. Hydrogen (H)
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7. give the symbol and number of protons in one atom of: lithium ______…
Lithium: Li, 3 Iron: Fe, 26 Oxygen: O, 8 Krypton: Kr, 36 Bromine: Br, 35 Copper: Cu, 29 Mercury: Hg, 80 Helium: He, 2 Uranium: U, 92 Boron: B, 5 Antimony: Sb, 51 Chlorine: Cl, 17 …
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step #1: find the mass of water. notes: the water can be driven off by …
Formula of the hydrate: $MgCO_3\cdot5H_2O$ Name of the hydrate: magnesium carbonate pentahydrate
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5. the ______________ of an element is the total number of protons and …
5. mass number; nucleus 6. neutrons; atomic number; mass number
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4. the ____________ of an element is the average mass of an element’s n…
atomic mass; relative abundance
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3. the atomic number tells you the number of ____________ in one atom o…
protons; electrons; same
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2. the number of protons in one atom of an element determines the atom’…
Atomic number; Chemical properties
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based on your evidence, identify the type of compound for each substanc…
Claim: Physical properties can be used to identify bond type because different bond types result in different physical properties due to the nature of the bonding forces. Evidence…
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1. the 3 particles of the atom are: a. ____________ b. ____________ c. …
1. a. Protons b. Neutrons c. Electrons a. Positive b. Neutral c. Negative 2. Atomic number; Chemical properties 3. Protons; Electrons; Same 4. Atomic mass; Abundance 5. Mass - num…
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2 electric and magnetic fields produce _. centripetal force atomic stru…
electromagnetic energy
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energy in motion physical science includes the study of energy. energy …
an earthquake
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matter states and molecular density according to this diagram, as matte…
become less compacted.
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which statements describe iambic pentameter as it is used in shakespear…
Each line contains five metrical feet. In a group of two syllables, the second is stressed.
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6.bsu mathematical computation 6 pts use the table below to answer ques…
28) $1.5\ ml$ 29) $6.82\ g/ml$ 30) $1.6\%$
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exercises - électronégativité (liasons ioniques et covalentes) 1. deter…
a) $\Delta$ÉN = 1.4, liaison covalente polaire. b) $\Delta$ÉN = 0.4, liaison covalente non polaire. c) $\Delta$ÉN = 1.8, liaison ionique. d) $\Delta$ÉN = 2.0, liaison ionique. e) …
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when sunlight strikes air particles, the light is scattered in all dire…
B. Diffraction causes the sky to look blue.
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sunlight sunlight looks white but is actually a mixture of all the colo…
Diffraction causes the sky to look blue.
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lucy is learning that atoms are made up of several smaller particles. h…
6. nucleus 7. electron
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2. when building your own atom, youve learned all about the balance of …
It has 6 protons
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read the excerpt from \the environmental ethic\. it is fashionable in s…
A. All species are worth protecting because even the small organisms contribute important functions in the environment
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what extensive property is the difference between a gold bar and a gold…
Mass
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4. gender schemas are most rigid at age 9 - 12. true false
False
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gender development quiz psychology / module 3: development over the lif…
They are permanent ideas of what it means to be masculine or feminine.
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behind the lines name:____ use complete sentences if needed. hour:____ …
19. Some soldiers faced combat - related risks like injury, capture, or death. 20. Coalition forces were afraid Saddam Hussein would use weapons of mass destruction (chemical or b…
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question 8(multiple choice worth 2 points) (05.02 mc) read the first st…
C. AABBA
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question 5 (matching worth 4 points) (05 02 lc) match each poetry term …
Line length - A Rhyme scheme - B Stanza breaks - D White space - C
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question 5 (matching worth 4 points) (05 02 lc) match each poetry term …
Line length - None of the above accurately (but conceptually related to syllable/foot - count); Rhyme scheme - B; Stanza breaks - D; White space - C
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read the sentence from an argumentative essay about chemical waste. the…
The chemical waste produced by factories is dangerous, and factory owners should be held accountable.
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question 4(multiple choice worth 2 points) (05.02 mc) amara wants to wr…
C. Sonnet
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what elements are present in sugars? carbon, hydrogen, oxygen oxygen, h…
carbon, hydrogen, oxygen
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compare a water molecule, h₂o, to a hydrogen peroxide molecule, h₂o₂. w…
Water and hydrogen peroxide are made from the same types of atoms, but combine in different ways.
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which changes involve forming or breaking chemical bonds? o boiling and…
burning and digesting
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what is the smallest part of a compound called? element atom mixture mo…
D. molecule
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question 1(multiple choice worth 2 points) (05.02 mc) ronan is reading …
D. Villanelle
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which choice is not an example of a molecule? o o₃ o koh o h₂s o mn
Mn
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read this stanza from allen ginsbergs \a supermarket in california.\ wh…
The long-line structure imitates stream-of-conscious thought.
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a student wants to create a liquid volcano. the student observes bubble…
The candy tablets being added to the drink.
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part b while studying chemical and physical changes, students added sal…
B. No, it is a physical change. It is salt and water and you can get the salt back by boiling off the water.
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there are different types of atoms. everything is made up of the atoms …
Bromine atoms
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according to the us food and drug administration (fda) what must any pr…
at least 95% organically produced ingredients
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question 2. a student is using a procedure to separate a mixture in the…
Part A. Chromatography Part B. Differences in solubility Part C. Separates a mixture into its individual components by causing different substances to move at different rates thro…
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question 6 of 25. an avalanche demonstrates what kind of energy convers…
A. Gravitational potential energy to kinetic energy
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10. consider the polar molecules in model 2. a. in general, the presenc…
1. **a**: Oxygen, nitrogen, and fluorine are common elements that make molecules polar due to high electronegativity. 2. **b**: Yes, non - polar molecules can have these elements.…
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3. nuclear testing and the use of harmful chemicals are not allowed any…
3. False 4. True
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question 15 of 28 you start biking at the top of a steep hill. as you t…
C. Potential energy to kinetic energy to heat energy
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question 14 of 28 a car engine fueled by gasoline uses which kind of en…
A. Chemical
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3. a cars paint starts to rust when it is exposed to moist air. is this…
It is a chemical change because rust (iron oxide) is a new substance formed through a chemical reaction between iron in the car's metal, oxygen, and water in moist air.
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quizzes and tests total points: -/150 attempts left: 1 seafood house wa…
No, this is an example of horizontal price - fixing and is illegal under the Sherman Act.
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a tumor is injected with 2.5 grams of iodine, which has a decay rate of…
60 60 60
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2. suppose a substance expands (increases in volume) when it is cooled.…
It is a physical change because the chemical composition of the substance does not change; only its volume (a physical property) is affected.
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1. classify each description as a physical change or chemical change. a…
a) Chemical change b) Chemical change c) Physical change d) Physical change e) Chemical change f) Chemical change g) Physical change h) Chemical change
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9ps atomic number, mass number, isotopes, and stuff 1 complete the foll…
$\ce{_2^4He}$: - element: Helium - # protons: 2 - # neutrons: 2 $\ce{_{26}^{56}Fe}$: - element: Iron - atomic #: 26 - mass #: 56 $\ce{_{13}^{27}Al}$: - element: Aluminum - # proto…
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summarize how neutralization occurs. describe how litmus paper will rea…
Neutralization happens when an acid and a base react, forming a salt and water through the combination of hydrogen and hydroxide ions. Litmus paper changes color: blue turns red i…
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identify the characteristics of an acid and a base.
Acid: Donates protons, sour taste, reacts with metals, turns blue - litmus red. Base: Accepts protons/donates OH⁻, bitter taste, slippery feel, turns red - litmus blue.
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directions: fill in the table with the missing parts. assume all of the…
| Element Name | Symbol | Atomic Number | Atomic Mass | Protons | Electrons | Neutrons | | ---- | ---- | ---- | ---- | ---- | ---- | ---- | | Carbon | C | 6 | 12.011 | 6 | 6 | 6 |…
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what do elements in the same column of the periodic table have in commo…
4. Elements in the same column of the periodic table have the same number of valence electrons and similar chemical properties. 5. In the solid state of most substances, atoms vib…
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what do elements in the same column of the periodic table have in commo…
Elements in the same column of the periodic table have the same number of valence electrons. The motion of atoms in the solid state of most substances can be described as vibratin…
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exercises for further practice name the following: hf(aq) p₂o₅ br₂ baco…
HF(aq): hydrofluoric acid P₂O₅: diphosphorus pentoxide Br₂: bromine BaCO₃: barium carbonate Fe(NO₃)₂: iron(II) nitrate or ferrous nitrate PbO₂: lead(IV) oxide or plumbic oxide SiC…
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what do elements in the same column of the periodic table have in commo…
Elements in the same column of the periodic table have the same number of valence electrons. The motion of atoms in the solid state of most substances can be described as vibratin…
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question 25 of 30. you want to test how the mass of a reactant affects …
B. The mass of one reactant at a time is varied, and the time it takes the reaction to finish is measured.
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question 24 of 30 how does chemistry affect the food you eat? a. food c…
B. Some meats may be vacuum sealed to preserve their freshness.
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what is the purpose of the chromatography solvent? the chromatography s…
The pigments dissolve in the chromatography solvent, which allows them to be separated.