C2 - Atoms, Compounds, Isotopes and Bonding

  • Isotopes
  • Chemical bonds
  • Atomic numbers
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What is the atomic number?
The number of protons.
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What is the mass number?
Total number of protrons and neutrons.
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How are compounds made?
Compounds are made when atoms of two or more elements are chemically combined together.
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What are isotopes?
Isotopes are different forms of the same element, which have the same number of protons but a different number of neutrons.
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What is ionic bonding?
Atoms lose or gain electrons to form charged particles (ions).
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What structure do ionic compounds have?
The ions have a regular lattice arrangement. There are very strong electrostatic forces of attraction between oppositely charged ions in all directions.
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What are the properties of ionic compounds?
High melting point, high boiling point, easily dissolved in water.
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What is the formula for ionic bonding?
(+1) + (-1) = 0
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Which groups have a positive ion?
Groups 1 and 2 in the periodic table.
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Which groups have a negative ion?
Groups 6 and 7 in the periodic table.
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What are covalent bonds?
Where atoms share electrons.
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How are covalent bonds shown?
in a dot and cross diagram (outer shell only).
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Other cards in this set

Card 2

Front

What is the mass number?

Back

Total number of protrons and neutrons.

Card 3

Front

How are compounds made?

Back

Preview of the front of card 3

Card 4

Front

What are isotopes?

Back

Preview of the front of card 4

Card 5

Front

What is ionic bonding?

Back

Preview of the front of card 5
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