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11 questions
the basic structural unit of matter
atom
matter
element
nucleus
a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means
element
subatomic particle
electron
matter
the positively charged subatomic particle contained in the nucleus of an atom
proton
neutron
electron
matter
The vertical (up and down) columns in the Periodic Table are called
groups
towers
periods
atomic numbers
what is the biggest group on the table
metals
nonmetals
metaloids
halogens
how many groups/families are on the table
15
16
17
18
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