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6. What is a compound?

  • A substance that consists of two or more types of elements
  • A substance that consists of two or more mixtures
  • A substance that consists of of one type of element

7. What is a base?

  • A substance that increases the rate of reaction
  • A substance that reacts with acids to neutralise them
  • A substance that reacts with alkalis to neutralise them

8. What is an atomic number?

  • The number of shells an atom has
  • The number of protons in an atom's nucleus
  • The number of electrons in an atom's nucleus
  • The number of neutrons in an atom's nucleus

9. What is the pH of an alkali

  • >7
  • < 7
  • 7

10. What is an element?

  • A substance that contains one type of atom
  • A substance that contains two or more types of atoms

11. What is the charge of a proton?

  • -1
  • +1
  • 0

12. What is a mixture?

  • A mixture is two or more substances not chemically bonded together
  • A mixture is two or more substances chemically bonded together

13. What is a mass number?

  • The sum of neutrons and electrons in an atom
  • The sum of protons and neutrons in an atom
  • The sum of protons and electrons in an atom

14. What is the charge of a neutron?

  • +1
  • 0
  • -1

15. What is a diatomic molecule?

  • A molecule that contains two or more atoms
  • A molecule that contains two atoms
  • A molecule that contains one atoms

16. What is a covalent bond?

  • A bond created between atom by sharing a pair of electrons
  • A bond created between atoms that have the same number of electrons
  • A bond created between atoms that have the same number of electrons

17. What is the pH of an acid?

  • < 7
  • >7
  • 7

18. What is the charge of an electron?

  • -1
  • 0
  • +1

19. What is an isotope?

  • Isotopes are atoms that have the same number of protons but differing numbers of neutrons
  • Isotopes are atoms that have the same number of neutrons but differing numbers of electrons
  • Isotopes are atoms that have the same number of neutrons but differing numbers of protons
  • Isotopes are atoms that have the same number of protons as electrons

20. What is mass?

  • Mass is the measure of the amount of a substance
  • Mass is the amount of different types of elements in a compound