AQA Combined Science Chemistry Units C1-C3

Name the subatomic particles of an atom

• protons, neutrons and elements

• protons and neutrons

• protons, neutrons and electrons

• neutrons and electrons

Which subatomic particle has a negative charge?

• None, because atoms are neutral

• electrons

• protons

• neutrons

Which subatomic particles have a mass?

• protons and neutrons

• neutrons

• electrons and protons

• Atoms don't weight anything

Which of the subatomic particles are not in the nucleus?

• protons

• neutrons

• electrons

• A nucleus is found in a cell and not in an atom

What do we call the substance which react together during a chemical reaction?

• ingredients

• reactors

• reactives

• reactants

Finish the word equation iron + oxygen -->

• iron oxide

• iron hydroxide

• ironide

• FeO

What is a reversible reaction?

• The reactants have to be put together backwards

• The products come out backwards

• The products can react again to form the reactants

• This is a trick question, reactions are not reversible

What is NOT a sign that a reaction has happened?

• fizzing

• a genie appears

• colour change

• ignition (a flame)

What technique separates an insoluble solid from a liquid?

• crystallisation

• filtering

• chromatography

• fractional distillation

In which separation techniques is the process of evaporation important?

• Crystallisation and filtering

• Chromatography and distillation

• Distillation and crystallisation

• Distillation and filtering