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Slide 2

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ATOMIC RADIUS
Increases down the
Be group
More electrons so more
Mg energy levels
More shielding
Ca (outweighs effect of
extra proteins)
Sr Less attraction
between nucleus &
outer electrons
Ba…read more

Slide 3

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FIRST IONISATION
ENERGY
Decreases down the
Be group
More energy levels
Mg
More shielding
(outweighs effect of
Ca Decreases extra protons)
Less attraction between
Sr nucleus & outer
electrons so they are
lost more easily
Ba…read more

Slide 4

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MELTING POINT
1st Decreases down the
Ionisation group
Be
All elements in Group 2
bond using metallic
Mg bonding
Decreases Atomic size increases
Decreases
Ca down the group
More distance between
Sr nucleus and delocalised
electrons
Shielding outweighs
effect of increased
protons
Ba
Metallic bonds are
weaker so less energy is
required to break the…read more

Slide 5

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REACTIVITY
Melting
1st point
Ionisation
Be
Mg Increases down the
group
Increases
Decreases Increased atomic
Decreases
Ca
radius
Sr Electrons are easier
to lose
Ba…read more

Slide 6

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GROUP 2 ELEMENTS +
WATER
Magnesium reacts with steam
Mg + H2O (g) MgO(s) + H2
Magnesium, calcium, strontium & barium reacts with
cold water to produce a hydroxide & hydrogen
Mg + 2H2O Mg(OH)2 + H2
Ca + 2H2O Ca(OH)2 + H2
Sr + 2H2O Sr(OH)2 + H2
Ba + 2H2O Ba(OH)2 + H2…read more

Slide 7

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