The basic building blocks of matter

Most elements, 3/4 of them are

This is a measure of the pull of gravity on an object

Instrument that measures weight is a

Weight changes when what changes?

Is the amount of matter in an object

The part of an atom that is outside of the atom and has a negative charge

The very center of an atom is

This part of an atom is in the nucleus and has a positive charge

All the elements are organized in a table called

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