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5 Written questions

5 Matching questions

  1. solution
  2. Atomic Mass
  3. solvent
  4. Compound
  5. Deoxyribonucleic acid
  1. a When two or more different atoms bind together to form a molecule.
  2. b a homogenous mixture of two or more components.
  3. c The sum of the masses of all the protons and neutrons contained in an atoms nucleus.
  4. d the liquid in which a solute is dissolved to form a solution.
  5. e nucleic acid found in all living cells:carries the organism's hereditary information.

5 Multiple choice questions

  1. Charged particles
  2. 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.
  3. Lack carbon and tend to be small, simple molecules.
  4. A substance that can release hydrogen ions (H+) in detectable amounts. having a sour taste and can dissolve many metals of burn a hole in your rug. pH below 7
  5. Bond formed from molecules where atoms share electrons.

5 True/False questions

  1. Hydrogen BondExtremely weak bonds formed when a hydrogen atom binds to one electron hungry nitrogen or oxygen atom is attracted to another electron hungry atom and a bridge if formed between them.

          

  2. BasesHydroxides ionize and dissociate in water releasing hydroxyl ions (OH-)

          

  3. BufferAnything that has mass and takes up space.

          

  4. EnergyA large group of organic compounds - contain carbon, hydrogen and oxygen with more carbon and hydrogens than oxygens.

          

  5. pHThe building blocks of elements.