The periodic table

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What are the examples of group 1 elements?
Lithium (Li) , Sodium (Na) , Potassium (K) , Rubidium (Rb) , Caesium (Cs).
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Sodium is stored in oil in the laboratory, why is that so?
Sodium reacts rapidly in air and moisture.
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What are the properties of group 1 elements?
Soft ( can be cut with a razor blade). Have low density ( can float on water). Have low melting points. React vigorously with water , catching fire or even exploding.
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What changes down the group 1?
The group 1 metals become MORE reactive as they move down the group. They react MORE vigorously with water.
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What are the group 7 elements called?
Halogens.
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What are the properties of group VII elements?
Exist as diatomic molecules ( Cl2) , have low melting point and boiling point. They become LESS REACTIVE as they move down the group.
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What are the distinctive trends they show?
Colour , state.
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Note 1
The melting and boiling points INCREASES down the group ( opposite to group I elements ).
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Note 2
The INTENSITY of colour INCREASES down the group.
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Note 3
A more reactive element displaces a less reactive element ( lower in the group ) from its salt dissolved in water.
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What are the group 0 elements called?
The noble gasses.
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What are the examples of the group 0 elements?
Helium (He) , Neon (Ne) , Argon (F) , Krypton (Kr) , Xenon (Xe).
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Why are the noble gases stable and do not form bonds?
Their outermost shell is full, therefore the noble gases are stable and do not form bonds with other atoms.
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What are the properties of group 0 elements?
They exist as monatomic molecules. They have low boiling points and low density ( at room temperature and pressure , they exist as gases).
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What are the uses of Helium?
In airships , weather balloons ( attribute : inert ( unreactive ) , low density ).
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What are the uses of Neon?
In advertising lights ( attribute : inert ( unreactive ) , glow at low pressure , high voltage.
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What are the uses of Argon?
As inert gas in light bulbs. In welding , manufacture of steel ( attribute : inert ( unreactive ) , even when white-hot.
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Why is that hot-air balloons are filled with helium and not hydrogen?
Hydrogen is flammable.
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What are the characteristics of transition elements?
They have high densities , high melting points. They form coloured compounds. They have variable oxidation states. The elements and their compounds are good catalysts.
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What are the characteristics of non- transition elements?
They have low densities, melting points. They compounds are usually colourless in water. They usually have fixed oxidation states. They are rarely used as catalysts.
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Other cards in this set

Card 2

Front

Sodium is stored in oil in the laboratory, why is that so?

Back

Sodium reacts rapidly in air and moisture.

Card 3

Front

What are the properties of group 1 elements?

Back

Preview of the front of card 3

Card 4

Front

What changes down the group 1?

Back

Preview of the front of card 4

Card 5

Front

What are the group 7 elements called?

Back

Preview of the front of card 5
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