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