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18 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is a chemical reaction?
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An irreversible process that forms a new substance and involves energy change
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What is a reactant?
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Substance can only be used in a reaction
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What is a product?
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Any substance that is produced in a reaction
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What is the symbol equation for:
Magnesium+oxygen=magnesium oxide |
2mg+O2=2MgO
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Mg magnesium
O oxygen |
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H2SO4
How many atoms are in the above? Which ones? |
2Hydrogen
1Sulphur 4Oygen |
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Ca(OH)2
How many atoms are in the above? Which ones? |
1Ca
2O 2H |
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Using the electronic 2,5,6: how many electrons are in the outer layer?
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6
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What is an atom?
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One, the smallest unit of matter
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What is an element?
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Only one type of substance
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What is a molecule?
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Same or different stuck together
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What is a compound?
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Two or more different types of atom joined together
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What are ions?
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They are charged particles. They form when an atom gains or loses electrons.
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What is a noble gas?
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These already have an outer shell of electrons. Stable and difficult to react.
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What is a metal ion?
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Always positive. +
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What is a non metal ion?
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Always form negative ions. -
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What is an ionic bond?
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They attract. Eg. Na+Cl-
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Formulae?
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The small numbers in formulae show how many atoms of the proceeding element there are
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What is a covalent bond?
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Two non metals bond together
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