Mastering Chemical Equations and Diatomic Molecules

What is the purpose of a chemical equation?

• To describe a chemical reaction using words.

• To describe a chemical reaction using formulas and symbols.

• To describe the color of substances.

• To describe the physical state of substances.

In a chemical equation, where are the reactants located?

• Below the arrow.

• On the left-hand side of the arrow.

• Above the arrow.

• On the right-hand side of the arrow.

What does the abbreviation (aq) stand for in a chemical equation?

• Liquid

• Aqueous solution

• Gas

• Solid

How would you write sodium chloride dissolved in water in a chemical equation?

• NaCl (aq)

• NaCl (g)

• NaCl (l)

• NaCl (s)

What is the chemical formula for sulfuric acid?

• HNO3

• H2CO3

• H2SO4

• HCl

Which of the following is a diatomic molecule?

• Helium

• Carbon

• Oxygen

• Sulfur

How many atoms are in a diatomic molecule?

• One

• Two

• Three

• Four

What is the chemical formula for aluminum bromide in a solution?

• AlBr4

• AlBr3

• AlBr2

• AlBr

What is the product when magnesium burns in oxygen?

• Magnesium oxide

• Magnesium chloride

• Magnesium nitrate

• Magnesium sulfate

What will be covered in the next lesson?

• Writing chemical equations

• Naming chemical compounds

• Understanding physical states

• Balancing chemical equations