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5 Written questions

5 Matching questions

  1. What is a neutron?
  2. How many of the 90 naturally- occuring elements are used by living organisms?
  3. How many electrons can the 2nd and 3rd shell of an atom hold?
  4. What is an ionic bond?
  5. What is an ionic compound?
  1. a The attraction btwn opposite charged ions.
  2. b up to 8 electrons.
  3. c an electronically neutral subatomic particle.
  4. d 25.
  5. e A compound held together by ionic bonds.

5 Multiple choice questions

  1. Protons and neutrons.
  2. The number of protons in an atom.
  3. A subatomic particle w/ a negative charge.
  4. Atoms held together by covalent bonds.
  5. 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

5 True/False questions

  1. What are the 4 most abundant elements in living cells?the atomic number.


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


  3. How many electrons can the inner shell of an atom hold?up to 8 electrons.


  4. What is a chemical reactions?Changes is the chemical compound of matter.


  5. Which part of the atom has the most energy?The outer shell.