Chemistry, asked by jamilk17, 5 months ago

Why 1st ionization energy of radium is higher than barium?

Answers

Answered by sedara652

Answer:

it is because if lanthanoide contraction .... there is a poor shielding effect in radium so its electons are bound to the nucleus very strongly then in barium and therfor its ionisation energy is higher than barium.....

Answered by Anonymous

Answer:

is because if lanthanoide contraction .... there is a poor shielding effect in radium so its electons are bound to the nucleus very strongly then in barium and therfor its ionisation energy is higher than barium.....

A radium nucleus has 32 more protons than a barium nucleus (57% more), so its attractive force on any of its electrons is correspondingly greater. This increases the amount of energy needed for ionisation. ... This increases the amount of energy needed for ionization.

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