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rad106
| Question | Answer |
|---|---|
| 1. Which of the following is the largest source of human-made radiation? | X-rays |
| 2.____________ is the transfer of energy. | Radiation |
| 3.Which of the following states the law of conservation of energy? | Energy may be transformed from one form to another, but it cannot be created or destroyed. |
| 4.Thermal radiation is the transfer of heat by the emission of ___________________. | infrared radiation |
| 5.Exposure is measured in units of ___________. | grays |
| 6.The SI unit of velocity is _____________________. | meters per millisecond |
| 7.Which of the following explains the difference between speed and velocity? | One involves acceleration, and the other does not. |
| 8.A chemical compound is any quantity of _______________. | two types of molecules |
| 9.When atoms of various elements combine, they form __________. | molecules |
| 10.Rutherford’s experiments in 1911 showed that the atom was composed of _________________. | electrified plum pudding |
| 11.The binding energies, or energy levels, of electrons are represented by their ___________. | shells |
| 12.The chemical element is determined by the number of __________ in the atom. | protons |
| 13.The innermost electron shell is symbolized by the letter _____. | K |
| 14.The term “atom” was first used by the ___________. | Greeks |
| 15.The atomic number of an element is symbolized by the letter _____. | Z |
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