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Unit 3 <1&2
Vocab
| Term | Definition |
|---|---|
| atom | the smallest particle into which an element can be divided and still be the same element |
| electron | negatively charged particles |
| nucleus | small, dense center that has a positive charge surrounded by moving electrons |
| proton | positively charged particles |
| neutron | uncharged particles |
| electron cloud | the area that electrons move around the nucleus |
| atomic number | number of protons in the nucleus of an atom |
| mass number | total number of protons and neutrons in an atom's nucleus |
| periodic table | arrangement of the elements |
| chemical symbol | an abbreviation for the element's name |
| average atomic mass | the weighted average of the masses of all the naturally occurring isotopes of that element |
| metal | elements that are shiny and conduct heat and electricity well |
| nonmetal | poor conductors of heat and electricity; often dull and brittle |
| metalloid | elements that have some properties of metals and some properties of nonmetals |
| group | each vertical column of elements from top to bottom on the periodic table |
| period | each horizontal row of elements from left to right on the periodic table |
Created by:
18mturnbough1220
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