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Unit 2- Chemistry
Unit Test
| Term | Definition |
|---|---|
| atomic number | the number of protons contained in an atom of an element |
| Periodic Table | a chart that shows all of the elements arranged by increasing atomic numbers and by properties |
| group | A column on the periodic table |
| period | A row on the periodic table |
| element | A pure substance made of only one kind of atom |
| chemical symbol | an abbreviation for the element's name |
| proton | larger particles that have a positive charge and can be found in the nucleus |
| neutron | larger particles that have a neutral charge and can be found in the nucleus |
| electron | smaller particles that have a negative charge and can be found on the outer shells |
| atom | smallest part of an element; called the "building blocks" of matter |
| compound | A pure substance that contains atoms of different elements. |
| chemical bonds | The lines that connect atoms to make molecules |
| molecule | Any atoms that are connected by chemical bonds are called this |
Created by:
samantha_weigle
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