Below is a table of 1^st ionization energies for elements A,B,C, and D which are metals.

Below is a table of 1^st ionization energies for elements A,B,C, and D which are metals.

a) What is meant by 1^st ionization energy?
b) With an explanation, arrange the elements in order of increasing reactivities.

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(a) This is the energy required to remove the 1st outermost electron from an atom in gaseous
state to form an ion.

Higher ionization energy implies high nuclear charge which hinders removal of electron.

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sharon kalunda answered the question on May 13, 2019 at 12:12

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