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5 Written questions

5 Matching questions

  1. Bases
  2. Atom
  3. Ions
  4. Atomic Number
  5. synthesis reaction
  1. a The building blocks of elements.
  2. b Occur when two or more atoms or molecules combine to form a larger, more complex molecule. A+B->AB
  3. c number given to an element equal to the number of protons its atoms contain.
  4. d Charged particles
  5. e Hydroxides ionize and dissociate in water releasing hydroxyl ions (OH-)

5 Multiple choice questions

  1. functional proteins that act as biological catalysts. A catalyst is a substance that increases the rate of a chemical reaction without becoming part of the product or being changed itself.
  2. Heavier isotopes of certain atoms are unstable and tend to decompose to become more stable.
  3. nucleic acid found in all living cells:carries the organism's hereditary information.
  4. Provides a form of chemical energy that all body cells can use. WIthout this, molecules cannot be made or broken down, cells cannot maintain boundaries, and all life processes stop.
  5. the main building material of all cells.

5 True/False questions

  1. EnergyThe building blocks of elements.


  2. Exchange reactionsOccur whenever atoms combine with or dissociate from other atoms.


  3. IsotopesAtoms with the same number of protons and electrons but vary in the number of neutrons they contain.


  4. Ionic bondsBond formed when electrons are completely transferred from one atom to another.


  5. valence shellAn atoms outermost electron shell.