Counting atoms

What does the subscript in a chemical formula tell you? (a)  

• How many molecules are present
• How many atoms are present
• How many elements are present
• How many neutrons are present

• 1

• 2

• 3

• 4

• 6

• 1

• 12

• Iron, Oxygen

• Francium, Europium, Oxygen

• Ferrium, Oxygen

• Berylium, Oxygen

• 2

• 4

• 3

• 4

• 3

• 2

• 6

Which of the following is a molecule of a compound?

• Element

• Compound

Which chemical formula correctly displays 1 atom of nickel and 2 atoms of Fluorine?

• niF2

• NIF₂

• Ni₁F₂

• NiF₂

• 18

• 12

• 25

• 24