Chemistry Paper

What is the smallest part of an element that can still be recognized as that element?

• Atom

• Molecule

• Compound

• Mixture

Which of the following best defines an element?

• A substance made of only one type of atom

• A substance made of two or more different atoms chemically bonded together

• A substance made of more than one atom chemically bonded together

• A substance made of more than one thing not chemically bonded together

Which of the following is a substance made of two or more different atoms chemically bonded together?

• Compound

• Element

• Mixture

• Atom

What is a molecule?

• A substance made of more than one atom chemically bonded together (can be atoms of the same type)

• A substance made of only one type of atom

• A substance made of more than one thing not chemically bonded together

• A ball of positive charge with negative electrons distributed into it

Which of the following is a mixture?

• A substance made of more than one thing not chemically bonded together

• A substance made of only one type of atom

• A substance made of two or more different atoms chemically bonded together

• A substance made of more than one atom chemically bonded together

What do chemical reactions involve?

• The formation of one or more new substances

• The separation of mixtures

• The movement of electrons between shells

• The splitting of atoms into subatomic particles

Which of the following is NOT a separating technique?

• Filtration

• Crystallisation

• Distillation

• Evaporation

Which are the three subatomic particles?

• Protons, neutrons, electrons

• Atoms, molecules, ions

• Protons, electrons, ions

• Neutrons, atoms, molecules

What is the mass of an electron?

• 0

• 1

• -1

• +1

What is the relative charge of a proton?

• +1

• 0

• -1

• +2