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1.2 The Simplest Mat
6th grade science
Question | Answer |
---|---|
atomic number | the number of protons in the nucleus of each atom of that element |
isotopes | atoms of the same element that have different numbers of neutrons |
mass number | the number of protons plus the number of neutrons it contains |
atomic mass | the weighted average mass of the isotopes of an element. |
metals | have a shiny or metallic luster and are good conductors of heat and electricity. All metals, except mercury are solids at room temperature. |
nonmetals | elements that are usually dull in appearance |
metalloids | elements that have characteristics of metals and nonmetals |