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21 Cards in this Set
- Front
- Back
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What does the nucleus of an atom contain?
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protons and neutrons
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Where are the electrons found?
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orbiting the nucleus
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What is the mass and charge of a neutron?
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Mass 1
Charge 0 |
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Balance this;
Na + Cl2 -> NaCl |
2Na + Cl2 -> 2NaCl
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Balance this;
K + H2O -> KOH + H2 |
2K + 2H2O -> 2KOH + H2
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What are the 4 state symbols and what do they mean?
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(s) solid
(l) liquid (g) gas (aq) aqueous- dissolved in water |
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What metal gives off a lilac flame when burnt?
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Potassium
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What feature of an atom determines the order of the periodic table?
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Atomic number (number of protons)
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What are the rows of the periodic table known as?
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Periods
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What are the columns of the periodic table known as?
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Groups
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Oxygen has an atomic number of 8 and an atomic mass of 16. How many protons, electrons and neutrons has it got?
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8 protons
8 electrons 8 neutrons |
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How many electrons can fit in the first shell of an atom?
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2
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How many electrons can fit in the 2nd, 3rd or 4th shells?
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8
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Which group are the alkali metals?
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Group 1
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What is the pattern of reactivity in group 1?
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They get more reactive as you go down the group.
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How does the reactivity change as you go down group 7?
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They get less reactive
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What is an ion?
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A charged atom
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How do ions form?
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By losing or gaining electrons
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What is an ionic bond?
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The attraction between positive and negative ions.
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What type of ions do metals form? and why?
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Positive.
They lose electrons to form a full shell of electrons. |
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What type of ions do non-metals form? and why?
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Negative.
They gain electrons to form a full shell of electrons. |
