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| 1.
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What is one difference between satellites and electrons?
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| | A) | You can calculate exactly where a satellite will be at any time. An electron's position must be estimated. |
| | B) | Satellites have a larger negative charge than electrons. |
| | C) | Satellites have positive electrical charges. Electrons have negative charges. |
| | D) | You can calculate exactly where an electron will be at any time. A satellite's position must be estimated. |
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| 2.
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A chlorine atom has 17 protons and 18 neutrons. How many electrons does it have?
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| | A) | 18 |
| | B) | 1 |
| | C) | 35 |
| | D) | 17 |
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| 3.
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A(n) __________ is an atom that has gained or lost an electron and is no longer neutral.
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| | A) | molecule |
| | B) | isotope |
| | C) | ion |
| | D) | compound |
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| 4.
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Which of the following is NOT true of the elements in Group 18?
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| | A) | They are all metalloids. |
| | B) | Their outer energy levels are complete. |
| | C) | They are all nonmetals. |
| | D) | They include the noble gases. |
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| 5.
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Nonpolar molecules do not have __________.
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| | A) | double bonds |
| | B) | unbalanced charges |
| | C) | covalent bonds |
| | D) | triple bonds |
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| 6.
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Based on what you know about sodium chloride, which of the following elements would you expect to form an ionic salt?
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| | A) | sodium and phosphorus |
| | B) | sodium and carbon |
| | C) | potassium and nitrogen |
| | D) | potassium and iodine |
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| 7.
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An ionic salt is made up of __________ and __________ lined up in a regular pattern.
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| | A) | negative metal ions, positive metalloid ions |
| | B) | negative metal ions, positive nonmetal ion |
| | C) | positive metal ion, noble gases |
| | D) | positive metal ions, negative nonmetal ions |
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| 8.
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What do lithium, sodium, and potassium have in common?
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| | A) | They are all nonmetals. |
| | B) | They are all Group I elements. |
| | C) | They all have two electrons in their outer energy levels. |
| | D) | They are all metalloids. |
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| 9.
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Electrons in the sphere closest to the nucleus are in the __________ energy level.
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| | A) | highest |
| | B) | negative |
| | C) | lowest |
| | D) | middle |
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| 10.
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What do atoms of boron and aluminum have in common?
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| | A) | They have three electrons in their outer energy levels. |
| | B) | They are metalloids. |
| | C) | They have the same number of neutrons in their nuclei. |
| | D) | They are metals. |
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| 11.
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A(n) __________ is a pure substance that contains two or more elements.
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| | A) | compound |
| | B) | molecule |
| | C) | ion |
| | D) | solution |
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| 12.
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The __________ an energy level is from the nucleus, the __________ electrons it can hold.
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| | A) | farther, more tightly bound |
| | B) | farther, more |
| | C) | closer, more |
| | D) | farther, fewer |
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| 13.
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How many electrons does an atom of carbon have in its outer energy level?
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| | A) | 6 |
| | B) | 4 |
| | C) | 12 |
| | D) | 8 |
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| 14.
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A(n) __________ is a method of representing atoms and the electrons in their outer energy levels.
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| | A) | electron dot diagram |
| | B) | chemical formula |
| | C) | chemical symbol |
| | D) | chemical equation |
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| 15.
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Most of an atom's mass is contained in __________.
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| | A) | the electron orbits |
| | B) | the electron cloud |
| | C) | its nucleus |
| | D) | its outer energy shell |
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| 16.
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A(n) __________ is formed between atoms when they share electrons.
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| | A) | ionic bond |
| | B) | electrical bond |
| | C) | salt |
| | D) | covalent bond |
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| 17.
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A(n) __________ is a force that holds two atoms together.
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| | A) | isotope |
| | B) | ion |
| | C) | chemical compound |
| | D) | chemical bond |
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| 18.
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Which of the following contains polar bonds?
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| | A) | nitrogen molecules |
| | B) | water molecules |
| | C) | magnesium chloride |
| | D) | sodium fluoride |
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| 19.
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The ions in ionic compounds are held together by __________.
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| | A) | unequal sharing of electrons |
| | B) | ionic bonds |
| | C) | equal sharing of electrons |
| | D) | covalent bonds |
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| 20.
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A(n) ________ is a combination of chemical symbols indicating what elements are present in a molecule.
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| | A) | subscript |
| | B) | chemical equation |
| | C) | chemical formula |
| | D) | superscript |
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