Chapter 2 Test
Chemistry of Life
Multiple Choice (1 point each)
find the choice that best completes the statement or answers the question.
____b1.The space meet the nucleus of an atom contains
|a. |protons. |c. |neutrons. |
|b. |electrons. |d. |ions. |
____c2.If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number would be
|a. |3. |c. |7. |
|b. |4. |d. |11. |
c____3.Isotopes are atoms of the selfsame(prenominal) element with the same number of protons and
|a. |a antithetical number of |c. |a different number of neutrons.|
| |electrons. | | |
|b. |a different number of |d. |the same number of neutrons. |
| |molecules.
| | |
___d_4.Which of the following is a use of radioactive isotopes?
|a. |can encounter the ages of rocks and fossils |
|b. |can be used to treat cancer and extinguish bacteria that cause food |
| |to spoil |
|c. |can be...If you involve to get a full essay, order it on our website: Orderessay
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