Atoms Test Practice

Match it! Select the correct answer from the pull down...Good luck!

If an atom has a mass of 10 and 5 protons, how many neutrons does it have?

APE means that the following three numbers match for an atom:

Number of electrons that can fit in the second energy level (circle or ring) of an atom.

To find mass I must:

If and atom has an atomic number of 94, how many protons does it have?

Negatively charged particles of an atom found outside the nucleus are...

To find neutrons, I must:

Number of electrons that can fit in the third energy level (circle or ring) of an atom.