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21 Cards in this Set

  • Front
  • Back
What charge does a proton have?
It has a positive charge.
What charge does a neutron have?
It has a neutral charge?
What charge does an electron have?
It has a negative charge.
What is an ion?
It is an atom or group of atoms with a negative or positve charge due to loss or gain of electrons.
What are the 6 major elements?
Carbon, Nitrogen, Oxygen, Phosphorus, Sulphur, and Hydrogen
What are the number of neutrons equal to?
It is equal to the mass number - the atomic number
What is an isotope?
It is varieties of an element that differ only in the atomic mass, but have the same atomic number.
What is a molecule?
It is an uncharged group of atoms held together by covalent bonds.
What is a compound?
It is a substance made up of 2 or more elements bonded together.
What is an isomer?
It is a compound with the same molecular formuila but a different arrangement of atoms.
What is an ionic bond?
It is a transfer of electrons between atoms to form charged ions.
What is a covalent bond?
It is when there is a sharing of electrons between atoms to form molecules.
What are inorganic compounds?
They are compounds that do not have carbon atoms.
What are the principle inorganic compounds in living organisms?
It is water, salt, and acids and bases.
What are acids and bases?
They are used by cells to maintain a balance of hydrogen ion concentration.
What are acids?
They are solutions with excess H+ ions- vinegar, acetric acid, citric acid
What are bases?
They are solutions with excess OH- ions- soaps, detergents, bleach
What are the types of autotrophic nutrition?
They are chemosynthesis and photosynthesis.
What is chemosynthesis?
It is energy from chemicals- some bacteria get energy from chemicals
What is photosynthesis?
It is energy from light. It is water+ light energy + carbon dioxide --> oxygen+ glucose+ water
What is the importance of photosynthesis?
It results in most of the chemical energy (food) available to organisms and is a source of most of the oxygen in the air