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Cards In This Set
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Element
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Are pure substances that cannot be broken down any further
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Wat is 4 elements that makes up 96 ?
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Carbon, hydrogen, oxygen and nitrogen
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Isotopes
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Are atoms of the same elements, but with different masses
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Atomic number
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Is the number of protons
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Mass number
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Is the sum of the protons and neutrons
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Compound
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Are substances composed of 2 or more atoms that are chemically combined
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Chemical bond
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Hold atoms together in a compound (balance)
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Ionic bond
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Atoms that transfer electrons form covalent bonds
E)H2O E NaCl ( salt) |
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Ion
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Are atoms that have lost or gained electrons, giving them a charge(EX: K+,Na+, H+, Cl-)
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Chemical equation
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Is used to represent a reaction (2H2O2) - (2H2o + o2) (reactants) - (products)
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Energy in reaction
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Energy is releasing when bonds are broken
energy is storing when bonds are formed |
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What molecule is water ??
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Polar molecue
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Water forms ? wat bond
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Hydrogen bonds
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Cohesion
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Water likes water
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Adhesion
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Water likes other sbustances
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