C2 Chemical Reactions Y7

If the atoms in a substance are all identical

• element

• compound

• molecule

• particle

Which is an element?

• CuO

• MgF₂

• H₂O

• Na

When lithium reacts with oxygen which chemical is formed?

• lithoxide

• lithium oxygen

• lithium oxide

• oxylithium

Which halogen is the most reactive?

• Fluorine

• Chlorine

• Bromine

• Iodine

What is a substance made of 2 or more elements combined?

• element

• atoms

• compound

• chemical

Melting ice is an example of....

• chemical change

• physical change

Tin + Oxygen --> Tin Oxide

What are the reactants?

• Tin

• Oxygen

• Tin Oxide

What is the formula for Carbon Dioxide?

• CO₂

• co2

• C₂O

• CO

particles are arranged in a regular pattern in a...

• Solid

• Liquid

• Gas

Turning a gas to a liquid is called...

• evaporation

• condensation

• melting

• sublimation