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Question | Answer |
---|---|
atomic mass | the average mass of all the isotopes of an element |
periodic table | a chart of all elements |
nucles | |
proton | same as atomic nuber and positive charged |
neutron | round at omic mass atomic nuber |
electron | on shells and negtive lee charged |
atomic mass unit (amu) | |
qatomic number | |
chemical symbol | one to tow leter that reperzent a element |
group | is a family |
family | is a group |
period | is a long line of elemints |
valence electron | |
halogen family | |
noble gas |