additional chemistry

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  • Created by: Niky2346
  • Created on: 19-02-16 17:32
periods are
horizontal
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groups are
vertical
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metals are found on what side?
the left-hand side in the centre
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non-metals are found on what side?
the right-hand side
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how are the elements in the periodic table arranged?
in order of their atomic numbers
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give the symbol for non-metal in perioid 3 of the periodic table.
Si P S Cl Ar
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what is the atomic number?
number of protons in nucleus
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what is the mass number?
total of protons and neutrons in nucleus
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what are isotopes
atoms of same element with different number of neutrons
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why does an ion have a charge?
it has lost electrons or gained electrons
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ions consist of..
a non-metal and metal
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cations are
are positively charged metals from the outcomes of ionic bonding
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anions are
are negitively charged non-metals from the outcomes of ionic bonding
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the metal ions in salt of sodium produce
a yellow flame
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the metal ions in salt of potassium produce
a lilac flame
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the metal ions in salt or calcium produce
a red flame
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the metal ions in salt of copper produce
a green-blue flame
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covalent bonding happens between
non-metals
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what happens in a covalent bonding
a covalent bond is a pair of elctrons that is shared between two atoms
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simple molecular covalent substances have
weak forces between the molecules: low melting points and low bioling points
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giant molecular convalent sunbstances
are strong. takes a lot of energy to break bond... melting and billing points are high
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alkali metals are in + properties
group 1 + soft metals, low melting points
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halogens are in + properties
group 7 + all react with metals to form compounds called halides. reactivity decreases as you go down.
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noble gases are in
group 0, they have a full outer shell. they are INERT
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noble gases uses:
welding ( argon or helium) inside filament light bulbs ( xenon or argon) fire- extinguishing systems ( argon)
25 of 25

Other cards in this set

Card 2

Front

groups are

Back

vertical

Card 3

Front

metals are found on what side?

Back

Preview of the front of card 3

Card 4

Front

non-metals are found on what side?

Back

Preview of the front of card 4

Card 5

Front

how are the elements in the periodic table arranged?

Back

Preview of the front of card 5
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