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5 Written questions

5 Matching questions

  1. What are elements?
  2. The number of covalent bonds an atom can form is equal to what?
  3. The tendency of water molecules to stick to each other is called
  4. What is mass?
  5. Which part of the atom has the most energy?
  1. a The sum of the number of protons and neutrons in its nucleus.
  2. b The number of additional electrons needed to fill its outer shell.
  3. c cohesion
  4. d The outer shell.
  5. e Substances that cannot be broken down into other substances.

5 Multiple choice questions

  1. Solid
  2. Electrons.
  3. The number of protons in an atom.
  4. is one in which the nucleus decays, giving off particles of energy.
  5. A compound held together by ionic bonds.

5 True/False questions

  1. What determines which element it is?the atomic number.


  2. What are isotopes?Substances that cannot be broken down into other substances.


  3. What is a covalent bond?Forms when 2 atoms share 1 or more pairs of outer shell electrons and forms a molecule.


  4. What is a polar molecule?Atoms held together by covalent bonds.


  5. What are the 4 most abundant elements in living cells?Oxygen, carbon, hydrogen, and nitrogen.


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