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1 | |
The existence of Cu2 O and CuO illustrates |
| | A) | the law of conservation of mass. |
| | B) | the law of multiple proportions |
| | C) | the law of definite proportions. |
| | D) | A and B. |
| | E) | A, B, and C. |
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2 | |
Rutherford's experiment with alpha particle scattering by gold foil established that: |
| | A) | electrons have negative charges. |
| | B) | protons are 1840 times heavier than electrons. |
| | C) | protons are not evenly distributed throughout an atom. |
| | D) | atoms are composed of protons, neutrons, and electrons. |
| | E) | protons are located in the nucleus of an atom. |
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3 | |
How many protons, neutrons, and electrons are there in an atom of chlorine-39? |
| | A) | 17 protons, 17 neutrons, and 22 electrons |
| | B) | 39 protons, 38 neutrons, and 39 electrons |
| | C) | 22 protons, 17 neutrons, and 17 electrons |
| | D) | 17 protons, 39 neutrons, and 17 electrons |
| | E) | 17 protons, 22 neutrons, and 17 electrons |
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4 | |
Two isotopes of an element differ in their |
| | A) | chemical symbols. |
| | B) | atomic masses. |
| | C) | atomic numbers. |
| | D) | numbers of protons. |
| | E) | numbers of electrons. |
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5 | |
Which of the following is not an example of an alkali metal? |
| | A) | Li |
| | B) | Cs |
| | C) | At |
| | D) | K |
| | E) | Rb |
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6 | |
How many protons and electrons are present in a Ca2+ ion? |
| | A) | 20 protons and 18 electrons |
| | B) | 18 protons and 20 electrons |
| | C) | 20 protons and 21 electrons |
| | D) | 20 protons and 19 electrons |
| | E) | 22 protons and 20 electrons |
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7 | |
What is the formula for the ionic compound formed by calcium ions and phosphate ions? |
| | A) | CaPO4 |
| | B) | Ca2 (PO4 )2 |
| | C) | Ca(PO4 )3 |
| | D) | Ca3 PO4 |
| | E) | Ca3 (PO4 )2 |
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8 | |
The correct Stock system name for CoCl3 is |
| | A) | cobaltous chloride. |
| | B) | cobalt trichloride. |
| | C) | cobalt(III) chloride |
| | D) | cobalt(III) trichloride. |
| | E) | cobalt chloride. |
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9 | |
The correct name of (NH4 )2 SO3 is |
| | A) | ammonia sulfite. |
| | B) | ammonium sulfate. |
| | C) | ammonia sulfate. |
| | D) | ammonium sulfite. |
| | E) | ammonium hyposulfite. |
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10 | |
The correct Stock system name for CuSO4. 5 H2 O is |
| | A) | cuprous sulfate pentahydrate. |
| | B) | copper(II) sulfate pentahydrate. |
| | C) | copper(II) sulfate hydrate. |
| | D) | copper(I) sulfate pentahydrate. |
| | E) | copper sulfate pentahydrate. |
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