Isotopes have different numbers of

• protons
• neutrons
• electron
• properties

How many protons does an Aluminum atom have? (use the picture to help you)

• 27
• 13
• 14
• 40

How many neutrons in carbon-14?

• 6
• 7
• 14
• 8

How many neutrons does an atom of the isotope Oxygen-16 have?

• 8
• 16
• 32
• 4

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

What is the atomic number of Neon, Ne?

• 10
• 20.1798
• 10.1798
• 7

An atom is electrically neutral when

• protons and neutrons are the same
• protons and electrons are the same
• neutrons and electrons are the same
• neutrons balance the protons and electrons

Isotopes of the same element have the same number of 

• protons
• neutrons
• electrons
• not enough information

How many protons are in a sodium atom, Na? (tap to enlarge the periodic table)

• Sodium has 1 proton.

• Sodium has 3 protons.

• Sodium has 11 protons

Which subatomic particle has a negative charge in the atom?

• proton

• neutron

• electron

• quark