Question

Select all true statements regarding Ionic Radii and Ionization Energies

Group of answer choices

first ionization energy increases down the group because the larger atom has more positively charged protons

the valence electrons of a cation experience a lower effective nuclear charge than in the neutral atom

formation of an anion is accompanied by an increase in the size of the atom

when atoms form cations the valence electrons are removed

the larger the effective nuclear charge on the electron, the more energy it takes to remove it

removal of valence electrons causes the atom to increase in size

Answer 1

1. False

First ionization energy decreases down the group because down the group size increases effective nuclear charge decreases.

2. False

Valence electrons in a cation experience more effective nuclear charge as the protons are more than electrons in cation ,due to increase in effective nuclear charge size of cation decrease thus the effective nuclear charge is more in cation when compared to neutral atom.

3. True

Formation of an anion is accompanied by increase in size due to lower effective nuclear charge and electron -electron repulsion the size of anion increases by addition of electron.

4. True

Cations are positively charged species formed by removal of valence electron.

5. True

Greater the effective nuclear charge means greater attraction between nucleus and electrons thus more energy is required to remove the valence electrons.

6. False

Removal of valence electrons results in increase of effective nuclear charge thus decrease in size as the positive charge (protons) becomes more compared to negative charges (electrons) thus attraction between protons and electrons increases size decreases.