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Science 7 4-1
Question | Answer |
---|---|
atom | smallest particle of an element |
electron | negative charge |
electron | outside of nucleus |
nucleus | center of atom |
proton | positive charge |
proton | inside nucleus |
neutron | no charge |
neutron | inside nucleus |
atomic number | number of protons |
mass number (atomic mass) | sum of protons and neutrons |
period | horizontal rows |
group | vertical columns |
family | another name for group |
atomic number | how modern periodic table is arranged |
groups | elements in them have similar characterisitics |
chemical symbol | one or two letters given to each element |
neutral | charge of an atom in natural state |