You are here: Home > A Level > Inorganic Chemistry (Core) > Periodicity > First ionisation energy down group 2
After studying this page, you should be able to:
The table shows first ionisation energy values for the common elements in group 2.
Element | Symbol | Atomic number | First ionisation energy /kJ mol–1 |
---|---|---|---|
Beryllium | Be | 4 | 900 |
Magnesium | Mg | 12 | 738 |
Calcium | Ca | 20 | 590 |
Strontium | Sr | 38 | 550 |
Barium | Ba | 56 | 503 |
The graph shows how the first ionisation energy varies down group 2:
Going down group 2:
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