Determines the type of element an atom is. The number of neutrons
The number of atoms
The number of electrons
The number of protons

for number of neutrons it is mass number take away the atomic number

number of electron is the same as number of proton unless there is a charge like +2 it will have 2 less electron than the proton (atomic number ) number.

number of proton is the atomic number

Explanation:

hope it make sense:)

the solar system used to have much dust particles option no d

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).