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5 Written questions

5 Matching questions

  1. Isotopes
  2. Ocean Acidification
  3. Mass Number
  4. Atomic Mass
  5. Cohesion
  1. a Decreasing pH of ocean waters due to absoprtion of excess atmospheric CO2 from the burning of fossil fuels.
  2. b The total mass of an atom; also called atomic weight. Given as a whole number, the atomic mass approximately equals the mass number.
  3. c One of several atomic forms of an element, each with teh same number of protons but different number of neutrons.
  4. d The sum of the number of protons and neutrons in an atom's nucleus.
  5. e The sticking together of molecules of the same kind, often by hydrogen bonds.

5 Multiple choice questions

  1. The dissolving agent of a solution. Water is the most versatile solvent known.
  2. An energy level representing the distance of an electron from the nucleus of an atom.
  3. Measures the intensity of heat.
  4. A substance that is dissolved in a solution.
  5. 18

5 True/False questions

  1. ElectronA subatomic particle with a single negative electrical charge. One or more electrons move around the nuclues of an atom.

          

  2. What 4 elements make up about 96% of living matter?Oxygen, carbon, hydrogen, and nitrogen.

          

  3. Covalent BondA covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electornegative atom, making it slightly negative and the other atom slightly positive.

          

  4. Atomic NumberThe total mass of an atom; also called atomic weight. Given as a whole number, the atomic mass approximately equals the mass number.

          

  5. NeutronA subatomic particle having no electrical charge, found in the nucleus of an atom.