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the atom
unit 3 lesson 1 and 2
| Question | Answer |
|---|---|
| atom | an element that conducts heat and electricity poorly |
| electron | a subatomic particle that has a negative charge |
| nucleus | in physical science an atoms central region which is made up of protons and neutrons |
| proton | a subatomic particle that has a positive charge and that is located in the nucleus of an atom; the number which determines the identity of an element |
| neutron | a subatomic particle that has no charge and that is located in the nucleus of an atom |
| electron cloud | a region around the nucleolus of an atom where electrons are likely to be found |
| atomic number | the number of protons in the nucleus of an atom |
| mass number | the sum of numbers of protons and neutrons in the nucleus of an atom |
| periodic table | an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column, or group |
| chemical symbol | a one two or three letter abbreviation of the name of an element |
| average atomic mass | the weighted average of masses of all natural occurring isotopes of an element |
| metal | an element that is shiny and that conducts heat and electricity well |
| nonmetal | an element that conducts heat and electricity poorly |
| metalloid | an element that has properties of both metals and nonmetals |
| group | a vertical column of elements in the periodic table; elements in a group share chemical properties |
| period | in chemistry a horizontal row of elements in the periodic table |
Created by:
18kellera1027
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