Atom

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The outer shells have a negative charge due to these particles.

To which group does sodium belong?

This particle is responsible for the positive charge of the nucleus.

Which is the most reactive group of metals on the periodic table?

Which is the most reactive group of nonmetals on the periodic table?

The dense, positivly charged center is called the __________.

If an atom has an atomic number of 6, it is the element _________.

How many electrons does nitrogen have?