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5 Written questions

5 Matching questions

  1. Matter
  2. Cohesion
  3. Mass Number
  4. Buffers
  5. Chemical Reaction
  1. a The sticking together of molecules of the same kind, often by hydrogen bonds.
  2. b A chemical substance that resists changes in pH by accepting hydrogen ions from or donating hydrogen ions to solutions.

    substance that minimize changes in pH.
  3. c Anything that occupies space and has mass.
  4. d The making and breaking of chemical bonds, leading to changes in the composition of matter.
  5. e The sum of the number of protons and neutrons in an atom's nucleus.

5 Multiple choice questions

  1. A scale we used to describe how acidic or basic a solution is. The scale ranges from 0-14, 0 being the most acidic and 14 being the most basic. 7 is neutral (pure water)
  2. A strong chemical bond in which two atoms share one or more pairs of outer-shell electrons.
  3. The smallest unit of matter that retains the properties of an element.
  4. A substance that is dissolved in a solution.
  5. A subatomic particle with a single positive electrical charge, found in the nucleus of an atom.

5 True/False questions

  1. SolventThe dissolving agent of a solution. Water is the most versatile solvent known.

          

  2. Ionic BondA chemical bond resulting from the attraction between oppositely charged ions.

          

  3. Third shell of an atom can contain how many electrons?8

          

  4. Radioactive IsotopeAn isotope whose nucleus decays spontaneously, giving off particles and energy.

          

  5. CompoundThe dissolving agent of a solution. Water is the most versatile solvent known.

          

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