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Chapter 3 Test
| Questions |
Answers |
| These are negatively charged particles originally discovered by Thomson. |
electrons |
| Rutherford inferred that an atom's positive charge must be packed within a small region in its center called the_______________. |
nucleus |
| Atoms with the same number of protons and different number of neutrons are called _____________________. |
isotopes |
| The _______________ of an element is the average mass of all the isotopes of that element. |
atomic mass |
| The metals of Group 1 are called the ______________. |
alkali metals |
| Most of these metals are hard and shiny metals. |
transition metals |
| An example of the use of a semiconductor is__________________. |
computer chips |
