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Slide 1

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By Liam Caudwell…read more

Slide 2

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Overview of the periodic table
The periodic table has eight main groups. For example, group 1
contains very reactive metals such as sodium - Na - while group 7
contains very reactive non-metals such as chlorine - Cl.
Note that you will never find a compound in the periodic table,
because these consist of two or more different elements joined
together by chemical bonds.
The modern periodic table is a chart containing the elements
arranged in order of increasing atomic number. A vertical column,
called a group, contains elements with similar properties. A
horizontal row is called a period. The atomic number of the
elements in a period increases from left to right along the row.…read more

Slide 3

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Groups in the periodic table
· The alkali metals, halogens and noble gases are three
important groups in the periodic table.
· The alkali metals are soft, reactive metals. They react
vigorously with water and become more reactive as you go
down the group.
· The halogens are reactive non-metals. They become darker as
you go down the group. Their reactivity decreases as you go
down the group and their boiling points increase. A more
reactive halogen will displace a less reactive halogen from
solutions of its salts.
· The noble gases are unreactive non-metals, which exist as
single atoms.…read more

Slide 4

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Groups in the periodic table diagram…read more

Slide 5

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The alkali metals - overview
The elements in group 1 are
called the alkali metals. They
belong to the left-hand column
in the periodic table. They are
very reactive and must be
stored in oil to avoid contact
with air or water.…read more

Slide 6

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Common properties of alkali metals:
The alkali metals have the following properties
in common:
· they have low melting and boiling points compared to most
other metals
· they are very soft and can be cut easily with a knife
· they have low densities (lithium, sodium and potassium will
float on water)
· they react quickly with water, producing hydroxides and
hydrogen gas
· their hydroxides and oxides dissolve in water to form alkaline
solutions…read more

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amazing super helpful

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