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Atomic Structure

Across
Carbon has an atomic number of 6, how many electrons would a neutral atom of carbon contain?
Which subatomic particle has almost no mass?
What tells you the exact number of protons in the nucleus
What is the charge of a proton?
In addition to the proton, which subatomic particle contributes to its mass?
What term describes if an atom has the same number of protons and electrons?
Down
If Boron, atomic number 5 has an atomic mass of 12, how many neutrons does it contain?
The mass of an atom can be determined by adding the number of neutrons and the number of what in an atom?
What is the charge of an electron?
What is charge of an neutron?
Atoms of the same element that have different atomic masses are called what?