Atomic theory

What did John Dalton state?

How many electrons can the first energy level hold?

In the diagram shown above, the electrons are Green, Red, Yellow

In the diagram shown above, the green particle has:

What happens if too many or too few neutrons are added to the nucleus?

What period does this element belong on?

Determine the charge of an ion with 5 protons, 5 neutrons, and 4 electrons.

What is the atomic number of this atom? Options: 3, 4, 5, 6

Which of the following is not found on the periodic table?

• atomic number
• element symbol
• atomic mass
• charge of ion

Which subatomic particles contribute the most to the mass of an atom? Options: Protons, Neutrons, Electrons, Protons only, Protons and Electrons, Protons and Neutrons