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5 Written questions

5 Matching questions

  1. How many electrons can the 2nd and 3rd shell of an atom hold?
  2. What is mass?
  3. What are the three types of chemical bonds?
  4. What is the atomic number?
  5. How many of the 90 naturally- occuring elements are used by living organisms?
  1. a Ionic
    Covalent
    Hydrogen
  2. b 25.
  3. c The sum of the number of protons and neutrons in its nucleus.
  4. d up to 8 electrons.
  5. e The number of protons in an atom.

5 Multiple choice questions

  1. Elements that exist in different forms
    Forms of an element that differ in mass
    Same num of protons and electrons but diff num of neutrons
  2. Substances that cannot be broken down into other substances.
  3. a molecule that has opposite charges on opposite ends.
  4. Electrons.
  5. cohesion

5 True/False questions

  1. What is ion?The term for atoms that are electronically charged as a result of gaining/losing electrons.

          

  2. What is a radioactive isotope?Elements that exist in different forms
    Forms of an element that differ in mass
    Same num of protons and electrons but diff num of neutrons

          

  3. What is matter?The sum of the number of protons and neutrons in its nucleus.

          

  4. What is a covalent bond?Formed when a particularly positive atom from one polar molecule is attracted to the partially negative atoms in another molecule.

          

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