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| 1 | |
Which of the following elements did the Romans name because of its grey colour? |
| | A) | iron |
| | B) | copper |
| | C) | potassium |
| | D) | tin |
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| 2 | |
A molecule is… |
| | A) | a group of compounds that release energy when ignited. |
| | B) | a random collection of particles that eventually separate. |
| | C) | a type of compound that is made of only one atom. |
| | D) | a type of particle that is made up of two or more atoms bonded together. |
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| 3 | |
The subscript written slightly below a chemical symbol represents… |
| | A) | the number of electrons present. |
| | B) | the number of protons present. |
| | C) | the number of atoms present. |
| | D) | the number of compounds present. |
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| 4 | |
List, in order, the number of atoms present for each of the following three chemical formulas: S8, 02, and P4. |
| | A) | two sulfur, two oxygen, and two phosphorus |
| | B) | ten sulfur, two oxygen, and four phosphorus atoms |
| | C) | eight sulfur, two oxygen, and four phosphorus atoms |
| | D) | four sulfur, four oxygen, and four phosphorus atoms |
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| 5 | |
How many carbon and hydrogen atoms are found in CH4 (methane)? |
| | A) | one carbon, and one hydrogen |
| | B) | one carbon, and four hydrogen |
| | C) | two carbon and two hydrogen |
| | D) | four carbon and four hydrogen |
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| 6 | |
How many oxygen atoms are present in C6H12O6? |
| | A) | two |
| | B) | four |
| | C) | six |
| | D) | twelve |
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| 7 | |
What is the total number of atoms found in the chemical formula for ammonia, NH3? |
| | A) | one |
| | B) | two |
| | C) | four |
| | D) | six |
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