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5 Written questions

5 Matching questions

  1. What determines which element it is?
  2. What is a molecule?
  3. What is an electron?
  4. What physical states is matter found in?
  5. What are the 4 most abundant elements in living cells?
  1. a the atomic number.
  2. b Solid
  3. c Oxygen, carbon, hydrogen, and nitrogen.
  4. d Atoms held together by covalent bonds.
  5. e A subatomic particle w/ a negative charge.

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. The outer shell.
  3. Forms when 2 atoms share 1 or more pairs of outer shell electrons and forms a molecule.
  4. Substances that cannot be broken down into other substances.
  5. Anything that has mass and occupies space.

5 True/False questions

  1. What determines the chemical properties of an atom?The number of electrons in the outermost shell.


  2. What is a radioactive isotope?is one in which the nucleus decays, giving off particles of energy.


  3. What is a polar molecule?a molecule that has opposite charges on opposite ends.


  4. What is ion?The sum of the number of protons and neutrons in its nucleus.


  5. What is an atom?The smallest unit of matter that still retains the properties of an element.