Atoms and the Period Table

Most of the mass of an atom is located where?

What subatomic particle has no charge?

What are the three subatomic particles located in an atom?

What makes an atom neutral?

The amount of energy an electron has depends on what?

The atomic number tells us what?

What does the atomic mass tell us?

What is the one or two letter abbreviation of an element called?

(Example: Nitrogen is N).

What are rows on the period table called?

Approximately how many elements on the periodic table are metals?