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unit 3, lesson 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 that are found in the atom |
| nucleus | a small, dense center that has a positive charge and is surrounded by moving electrons |
| proton | the positively charged particles in the nucleus |
| neutron | uncharged particles in the nucleus |
| electron cloud | electrons move within an area around the nucleus |
| atomic number | number of protons in the nucleus of an atom |
| mass number | total number of portions and neutrons in an atom's nucleus |
| periodic table | arrangement of he elements |
| chemical symbol | abbreviation for the element's name |
| average atomic mass | the weighted average of the masses of all the naturally ouccurring |
| metals | elements that are shiny and conduct heat and electricity well |
| nonmetals | poor conductors of heat and electricity |
| metalloids | elements that have some properties of metals and some properties of nonmetals |
| group | vertical column of elements with similar properties together |
| period | horizontal row of elements on the periodic table |
Created by:
18ldavis0806
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