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Chemistry
Atomic structure and the periodic table
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Cards (18)
Group 1
Alkali
metals with
water
Metals + water =
metal hydroxide
+
hydrogen
Group 1 Alkali metals with air/oxygen
Metal
+
oxygen
=
Metal oxide
Why do metals get more reactive as you go down group 1?
It gets easier to lose the
electron
Electrostatic
force gets
weaker
the greater the distance
Meaning the
1
electron is easier to
lose
The attraction between the outer electrons and the nucleus as you go down group 1 gets
weaker
The distance between the
nucleus
and the
outer shell electrons
as you go down the group one metals increases
Alkali
metals need to
lose
one electron
The
electrostatic
force gets weaker the further
down
the group 1 you get
The group number tells us how many
electrons
are in the
outer shell
The period tells us how many electron shells there are
Isotopes
are the atoms of the same element with the same number of protons and electrons but different number of
neutrons
How do group 7 halogens react with iron?
Iron + halogen =
iron halide
How do group 7 halogens react with
alkali metals?
Group 7 + halogen = metal halide + metal
Halogens go in
pairs
e.g F2, Br2
Why do halogens get
LESS
reactive as you go down the group?
One electron needs to be pulled in using
electrostatic
force from nucleus and the
greater
distance the harder it is
The distance between the nucleus and the outer shell
increases
as you go down the group 7 halogens which makes the attraction
weaker
The size of the halogens get
bigger
as you go down the group
Halogens need to gain
one
electron to react
Halogens get
less
reactive as you go down the group
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