化学
化学反応、化学量論、分子構造、元素の性質。
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consider the unbalanced equation for the oxidation of butene. c4h8 + 6o…
B. four carbon dioxide molecules and four water molecules
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the compound co₂ is made of two atoms of cobalt. one atom of cobalt and…
E. one atom of carbon and two atoms of oxygen.
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question 10. complete the table below by classifying each element as a …
| Element | Metal, Metalloid, or Nonmetal | Group Name | | ---- | ---- | ---- | | Magnesium (Mg) | Metal | Alkaline - earth metals | | Chlorine (Cl) | Nonmetal | Halogens | | Zirc…
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how is electronegativity related to covalent bonding? atoms must have s…
Atoms must have similar electronegativities in order to share electrons in a covalent bond.
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this formula equation is unbalanced. p4(s) + 6cl2(g) → pcl3(l) which co…
C. 4
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the chemical equation for the formation of ammonia is unbalanced. 3h₂(g…
B. 2
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which type of substances have chemical bonds that are not directional a…
C. metals
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7. give the systematic name for each of the following molecules. (1 mar…
a. 1 - chloro - propane b. 2 - chloro - propane c. 1 - fluoro - propane d. 2 - chloro - butane
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question 9. identify the group name for each element listed below. a) c…
a) Alkaline - Earth Metals b) Noble Gases c) Halogens d) Transition Metals e) Alkali Metals f) Transition Metals g) Noble Gases h) Actinides i) Lanthanides j) Halogens
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consider the positions of carbon, nitrogen, potassium, and calcium on t…
C. nitrogen (N)
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which statement describes how the bond between two oxygen atoms is form…
by sharing valence electrons between the two atoms
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which statement best describes the formula equation cl₂(g) + 2kbr(aq) →…
D. Chlorine gas reacts with potassium bromide to form potassium chloride in solution and liquid bromine.
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which word equation shows hydrogen reacting with oxygen to form water? …
hydrogen + oxygen → water
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what is the word equation for atoms of magnesium reacting with molecule…
B. magnesium + oxygen → magnesium oxide
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which of these is a property of a substance that is composed of atoms t…
It conducts electricity when it is dissolved in water.
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the incomplete table below shows selected properties of compounds that …
B. silver (Ag)
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question 8. in the periodic table below, label each identified group. 1…
From left - to - right (starting from the top - left labels): Alkali Metals Alkaline Earth Metals Transition Metals Halogens Noble Gases Lanthanides Actinides
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question 7. which list represents the classification of the elements ni…
Nonmetal, noble gas, metal, metalloid
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question 6. which group of elements contains a metalloid? group 2 group…
C. Group 16
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question 5. select all the properties that apply to nonmetals. dull app…
Dull appearance, Poor conductors of electricity, Brittle when solid
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consider the chemical equation for the combustion of sugar. _c6h12o6(s)…
1. 1, 6, 6, 6
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question 4. select all the properties that apply to metals. brittle whe…
High melting point, Malleable and ductile, Shiny (lustrous) appearance, Good conductors of electricity
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row bond cause physical property of compound 1 ? electron sharing among…
C. metallic
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question 3. classify the elements below as metals, nonmetals, or metall…
a) Metal b) Nonmetal c) Metalloid d) Metal e) Nonmetal f) Metal g) Metalloid h) Metal
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this formula equation is unbalanced. pb(no₃)₂(aq) + li₂so₄(aq) → pbso₄(…
B. 2
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which symbol can be used to indicate a chemical reaction that takes pla…
Pt
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practice it! a guitarist is playing music in a band. every time he pluc…
sound energy
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question 2. in the periodic table below, label metals, nonmetals, and m…
Light blue squares: Metals; Pink squares: Non - metals; Blue squares: Metalloids
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which pair of atoms would form a covalent bond? calcium (ca) and bromin…
Oxygen (O) and chlorine (Cl)
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homework 10 - 09/25/2025 question 1. describe the general properties of…
Metals: Good conductors of heat and electricity, high luster, malleable, ductile. Non - metals: Poor conductors, may be brittle, lack metallic luster. Metalloids: Intermediate pro…
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two carbon atoms use the energy and bond formation simulation (link pro…
The H - H bond is stronger than the C - C bond. The C - C bond is not stronger than the H - H bond as stated in the incorrect part of the statement. The C - C bond is weaker becau…
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multiple choice 1 point the potential energy is a measure of the attrac…
The two hydrogen atoms have a lower potential energy indicating their bond is stronger than that of oxygen.
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16. students are looking at the amount of organic matter in soil taken …
A line graph would show the changes between the variables of the amounts of organic matter and the depth.
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practice it! kristin was participating in the science fair this year. s…
chemical
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review it! some students were discussing and illustrating different way…
cooking cake batter to make cupcakes, starting a campfire
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review it! on independence day, a family watched fireworks at the beach…
C. sound and light
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5. how can you tell if the flame on a bunsen burner is getting too much…
The flame is blue in color.
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question 19 1 point the function of dendrites is to a control pain thro…
D. receive incoming signals from other neurons
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read the excerpts from lizzie bright and the buckminster boy. excerpt 1…
the only one for all the island's students.
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fluorine has 7 valence electrons. which charge is its ion likely to hav…
- 1
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a scientist is working with methane (ch₄) and butane (c₄h₁₀). which sta…
They are compounds made of the same two elements, but each contain different numbers of atoms.
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answer each question about the following atom when it becomes an ion. c…
Ionic name: Chloride ion Chemical symbol and charge: $Cl^-$ The ionic charge of - 1 is achieved when the atom gains 1 electron.
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which information about an atom can a period number give you? (1 point)…
how many energy levels it has
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daltons theory states that atoms are the smallest possible parts of ele…
rearrange and form new substances with new properties.
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which scientist and atomic model are correctly matched? bohr - plum pud…
Schrödinger – electron cloud surrounds nucleus
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how many total atoms are in a carbon dioxide molecule? hint: the sphere…
3
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question 42(multiple choice worth 3 points) (01.02a mc) which of the fo…
B. Unsaturated fatty acids
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question 38(multiple choice worth 3 points) (01 02a mc) polymers are fo…
Assembling molecules in either hydroxyl or carboxyl functional groups
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review: 1. chemical properties 2. neutron 3. proton 4. physical propert…
1. b 2. d 3. e 4. c 5. a 6. b 7. c 8. b 9. d 10. b
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question 36(multiple choice worth 2 points) (02.01 mc) which of the fol…
The positive and negative charges of the water molecule pull on the negative and positive ends of the ionic molecule to break them apart.
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what part of an ions symbol indicates its charge?
The superscript written after the element's symbol.
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3. observe: click reset (?). the electrons in the outermost orbit, call…
1; Li•
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vocab: atom: the smallest piece of matter that still retains the proper…
ionic bond: A chemical bond formed by the electrostatic attraction between oppositely - charged ions. covalent bond: A chemical bond involving the sharing of electron pairs betwee…
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2. analyze. electrons are arranged in orbits called energy levels. the …
A. 2 B. 8 C. 8
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2. which particles are produced by different types of bonding? -
Ions (in ionic bonding), molecules (in covalent bonding), delocalized electrons (in metallic bonding)
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activity b: electron arrangements question: how are electrons arranged …
Electrons are arranged in energy - levels (shells) around the nucleus, filling lower - energy levels first.
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how does the mass of a molecule affect the rate of diffusion? the heavi…
The lighter the molecule, the faster the rate of diffusion.
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4.2 - combination of atoms (notes) review questions: 1. what are ionic …
1. Ionic bonds are formed by the transfer of electrons between atoms creating positive and negative ions that attract each other. Covalent bonds are formed by the sharing of elect…
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which statement about compounds is true? compounds are simpler than ele…
A compound has different properties than the elements from which it is made.
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which of the following is a bond between two molecules? o a chemical bo…
a chemical bond in which no electrons are shared
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creating ions problem 6.2 - enhanced - with feedback correct the number…
6
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state the number of electrons that are gained by atoms of each of the f…
1
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list the three types of chemical bonds and describe each type of bond. …
1. Ionic bond: Formed by electron - transfer between atoms creating ions that attract. 2. Covalent bond: Atoms share electrons to gain stable electron - configuration. 3. Metallic…
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sodium (na) is a _______ * 2 points alkalai metal nonmetal noble gas me…
1. A. alkali metal 2. C. 20 3. D. Noble Gas
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what kind of charge does an ionic compound carry? * 2 points neutral po…
1. neutral 2. polar covalent bond 3. nonpolar covalent bond
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use the passage to answer the question. how does the author use details…
By providing evidence from a scientific study.
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in a covalent bond, electrons are __________. * 2 points shared lost ga…
1. A. shared 2. C. sodium chloride 3. B. sodium
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the average atomic mass is equal to the number of neutrons in an atom. …
1. B. False 2. A. True
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molecule or ion,number of valence electrons,total number of atoms and s…
| Molecule or ion | Number of valence electrons | Total number of atoms and sets of lone pairs surrounding central atom(s) | Structure geometry (name) | |---|---|---|---| | CCl₄ |…
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atoms consist of a positively charged center called a(n) __________. * …
1. D. nucleus 2. B. electrons 3. A. neutrons
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data table 2. vsepr names and atoms molecule or ion number of valence e…
Number of valence electrons: 32; Total number of atoms and sets of lone pairs surrounding central atom: 4; Structure geometry: tetrahedral
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an atom containing six positive charges and six negative charges has __…
1. D. no charge 2. B. quarks
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use this excerpt from the \a walk through the rainbow with pace\ articl…
Runoff from human - made chemicals contribute more to HABs than naturally occurring minerals.
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what happens to the rate of diffusion with temperature ? the higher the…
The higher the temperature, the faster the rate of diffusion.
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what is the fdas definition of its atural\ food label? produced by farm…
minimally processed and free of artificial ingredients, preservatives, and other unnaturally occurring chemicals
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which product, according to fda labeling, is raw, unprocessed, contains…
A. fresh tomatoes
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an atom that has gained or lost an electron is called an ion. true false
True
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why does your whole room smell like air freshener if you only spray the…
The molecules diffuse from the source throughout the space.
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ron is trying to work on his group potion project. in the version of ad…
For the first question: 211.90 °C For the second question: Yes the Harry is running a fever, 102.38°F For the third question: The correct answer is not provided in the options (sh…
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the methylene blue diffused in the water. what does this mean? it moved…
It moved from a high concentration to a low concentration.
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questions 6 through 8 refer to the following. 8 mark for review which o…
A. Thermosphere
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a student was asked to solve the following problem: the density of liqu…
Block 1: Answer II: 18.4 g Block 2: Answer V: $\frac{1\ cm^{3}}{1.141\ g}$ Block 3: Answer III: $\frac{1\ mL}{1\ cm^{3}}$
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you will have an unlimited number of attempts to pass this second math …
$B=\frac{3AY}{2X}$
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write the chemical symbols for three different atoms or atomic anions w…
Ar, $Cl^-$, $S^{2 -}$
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write the chemical symbols for three different atoms or atomic cations …
Be, B⁺, C²⁺
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which of the following is a bond between two molecules? a chemical bond…
a chemical bond in which a positively charged ion attracts a negatively charged ion
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explain how the different particles in an atom describe the element and…
Protons define the element by determining the atomic number. Neutrons influence the isotope and stability. Electrons, particularly valence electrons, dictate chemical properties t…
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seeking a treatment for schizophrenia, scientists at the munsterlingen …
B. mood
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questions 3 and 4) identify the independent and dependent variables in …
Independent Variable: 8. Number of Unpaired Electrons Dependent Variable: 7. Magnetism
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13 during a phase change, what happens to the temperature? 14 if water …
13. The temperature remains constant. 14. Liquid. 15. Solid. 16. Gas. 17. 273.15 K. 18. 373.15 K. 19. False. Water molecules are changing phase from liquid to gas, not being destr…
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xanthine means - organelle in which photosynthesis takes place - a yell…
A yellow chemical compound found in blood and urine
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draw lewis structure for, $cho_2^{-}$
The Lewis structure has a carbon atom in the center. It is single - bonded to a hydrogen atom and single - bonded to one oxygen atom with 3 lone - pairs and double - bonded to ano…
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which of the following would i use to separate oil and water, two liqui…
B. separating funnel
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which type of equipment do you use to mix chemicals together? d. glass …
d. glass stirrer
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5 indique si lénoncé est vrai ou faux. sil est faux, corrige - le. a) l…
a) Faux. Certains éléments existent sous forme de molécules. b) Faux. Les composés ioniques sont formés d'ions. c) Faux. Les molécules d'éléments ne sont pas des composés. d) Vrai.
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atoms share electrons in ionic bonds. true false
False
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which part of the atom participates in bonding? o neutron o nucleus o e…
C. electron
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4. indique si lassertion est vraie ou fausse. a) les particules dun élé…
# Explications brèves: a) L'échantillon A est un mélange hétérogène car il peut être séparé en un solide et un liquide par filtration. b) L'échantillon B est un élément car c'est …
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write the electron configuration for a neutral atom of magnesium.
$1s^{2}2s^{2}2p^{6}3s^{2}$
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write the electron configuration for a neutral atom of carbon.
$1s^{2}2s^{2}2p^{2}$