All About Atoms

The periodic table is arranged by the atomic number of elements. What is the atomic number of an atom?

• The number of neutrons

• The number of electrons

• The number of protons

• The nucleus

The atomic number is the number of protons in an atom. What is the atomic number of this element?

• 11

• 23

• 34

• 12

These are all nuclei of istopes of Carbon. We know they are all Carbon because they have the same number of

• Electrons

• Neutrons

• Protons

We know these two atoms belong to the same element because they have the same:

• Number of electrons

• Number of neutrons

• Number of protons

• Number of energy shells

What is the atomic MASS of this element?

• 26

• 56

• 30

What is the atomic NUMBER (or number of protons) of the element?

• 26

• 56

• 30

• Iron

How would you find the number of neutrons in this atom?

• The Atomic Number + the Atomic Mass

• The Atomic Number x the Atomic Mass

• The Atomic Mass - the Atomic Number

• Guess???

What subatomic particles make up all the mass and are in the nucleus?

• Electrons and Protons

• Electrons and Neutrons

• Neutrons only

• Protons and Neutrons

What cannot change in an atom, or it would become a different element?

• the number of neutrons

• the number of protons

• the number of electrons

• the number of protons and neutrons

What is the electrical charge of a neutron?

• Positive

• Negative

• Neutral