Writing of Chemical Formula

What is the chemical formula of Magnesium chloride?

• MgCl

• MgCl₂

• MgC

• MgC_2

What is the chemical formula of sodium sulfate?

• SSO₄

• Na₂S

• NaSO₄

• Na₂SO₄

Answer explanation

Note the different spelling and the associated formula

What is the formula of Copper (II) oxide?

• CUO

• CuO

• CuO₂

• Cu₂O

How many atoms are there in the compound MgCO₃?

• 3

• 4

• 5

• 6

How many elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Answer explanation

C₆H₁₂O₆ consists of 3 elements: Carbon (C), Hydrogen (H), and Oxygen (O).

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3

• 6

• 12

• 24

Answer explanation

There are 6 atoms of carbon (C) in C6H12O6 because each molecule of glucose (C6H12O6) contains 6 carbon atoms.

The blue atoms are called 

• metals
• nonmetals
• metalloids
• noble gases

Which elements are in the formula shown above?

• Tin and Chlorine

• Tin, Carbon and Lithium

• Sulfur, Nitrogen and Chlorine

• Sulfur, Nitrogen, Carbon and Lithium

How do the following two elements bond together?
Cr³⁺  O^2-         

• CrO
• Cr₃O₂
• Cr₂O₃
• CrO₃

What the chemical name for AgF?

• silver fluoride
• silver fluorine
• monosilver monofluoride
• silver monofluorine