Chemical formulae

What does the subscript in a chemical formula tell you?

• how many molecules are present

• how many elements are present

• how many atoms are present

• how many neutrons are present

How many elements are in this chemical formula? H₂SO₄

• 1

• 2

• 3

• 4

How many atoms of carbon are in this formula? C₆H₁₂O₆

• 1

• 6

• 12

What elements are represented in this chemical formula? Fe₂O₃

• Iron, oxygen

• Ferrium, oxygen

• Francium, europium, oxygen

• Beryilium, oxygen

What is the total number of atoms in this formula? H₂O₂

• 2

• 3

• 4

• 6

How many more atoms of oxygen than magnesium are in this formula? MgSO₄

• 2

• 3

• 4

• 6

Which of the following elements is least likely to form a compound?

• Hydrogen

• Argon

• Sodium

• Potassium

Which of the follwoing is a molecule of a compound?

• H₂

• H₂O

• Cl₂

• F₂

Which one is the odd one out?

• sodium

• carbon

• glucose

• gold

Is this an element or a compound? CaSO₄

• Element

• Compound