Year 8 - Intro to Chemistry

What is a compound?

• A pure substance made up of ONE (1) type of atom

• A mixture of different types of substances that can be separated

• Two (2) DIFFERENT types of atoms that are chemically bonded together

• Is made up of only metals

Which of the following is an example of an element?

• H2O (Water)

• CO2 (Carbon Dioxide)

• NaCl (Sodium Chloride)

• O2 (Oxygen)

What is the charge of a proton?

• Positive

• Negative

• Neutral

• No charge

What is the charge of an electron?

• No charge

• Negative

• Positive

• Neutral

Which subatomic particle is found outside the nucleus (in the shell or cloud)

• Protons

• Electrons

• Neucleon

• Neutrons

Which process describes a solid turning into a liquid?

• Sublimation

• Evaporation

• Melting

• Condensation

Which process describes a liquid turning into a gas?

• Freezing

• Evaporation

• Melting

• Condensation

What is the atomic number of this element?

• Ar

• 18

• Argon

• 39.948

Which of the following is a compound?

• O2

• H2O

• N2

• C

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• No charge