Question

15° 25 2p 35"

Answer 1

B. Lower elements have more energy levels

Explanation:

Ionization energy decreases down the group because lower elements have more energy levels. Therefore, the pull of the nucleus on the outermost shell electrons is not so great.

• Ionization energy is the energy required to remove an electron from an atom.
• It is a measure of the readiness of an atom to lose an electron.
• Down a group or family, atomic radius increases due to addition of more electronic shells or energy levels.
• As the atomic radius becomes larger, the ionization energy reduces.
• This is because of the increased shielding/screening effect of inner shell electrons on the electron to be removed from the nuclear attraction.
• This way, its takes a lesser amount of energy to remove them as shielding effects increases down the group.

Learn more:

ionization energy brainly.com/question/1971327

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