Cheney 1

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The part of an atom that has no charge.

The negatively charged particles are the-

A pure substance made of only one kind of atom.

Atoms join together to form -

What are the positively charged particles in the nucleus of an atom?

Protons and neutrons are packed in the -

The number of protons in an element is known as its

The first 1 or 2 letters of an element's name.