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5 Written questions

5 Matching questions

  1. Element
  2. Ion
  3. Acid
  4. pH Scale
  5. Atomic Number
  1. a A substance that increases the hydrogen ion concentration in a solution. 0 on pH scale is a strong acid.
  2. b An atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.
  3. c A subsctance that cannot be broken down to other substance by ordinary chemcial means.
  4. d The number of protons in each atom of a particular element.
  5. e 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)

5 Multiple choice questions

  1. A subatomic particle having no electrical charge, found in the nucleus of an atom.
  2. Measures the intensity of heat.
  3. An ending material in a chemical reaction.
  4. One of several atomic forms of an element, each with teh same number of protons but different number of neutrons.
  5. A chemical bond resulting from the attraction between oppositely charged ions.

5 True/False questions

  1. 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.


  2. Mass NumberThe sum of the number of protons and neutrons in an atom's nucleus.


  3. SoluteA liquid that is a homogeneous mixture of two or more substances.


  4. BuffersAn atom's central core, containing protons and neutrons.


  5. Surface TensionA measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules.


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