Can anyone help me fill this out?

a) protons

b) neutrons

c) electrons

d) +1

e) nucleus

f) -1

g) Atomic number

h) mass number

Explanation:

The chart represents the description of atoms.

- Atoms are smallest part of a chemical element capable of undergoing a chemical reaction typical of the element.

e.g an atom of oxygen retains all the chemical properties of oxygen.

- Atoms consists of three subatomic particles named protons, with a positive charge; neutrons, with no charge (electrically neutral); and electrons, with a negative charge.

- Atomic number is unique to each element

Sodium is 23, Magnesium is 24 etc

- Mass number of an element is the sum of its protons and neutrons. And for isotopes, mass number varies while atomic number remains the same.