Question

Identify the elements that has the lower ionisation energy in each pairs of the following and mark it with a symbol. 1)Mg or Na. 2)Li or O. 3)Br or F. 4)K or B
please answer ​

Answer 1

Answer:

1. Na

2. Li

3. Br

4. K

Explanation:

Hope it's helpful

Answer 2

1. Na.
2. Li
3. Br
4. K

• The minimum amount of energy required to remove an electron from a species is called its ionisation energy.
• Among Mg and Na, Mg has a filled 3s orbital whereas Na has a half-filled 3s orbital so, the electron can be easily removed from Na and has low ionisation energy.
• Among Li and O, O has 4 electrons in a 2p orbital whereas Li has a half-filled 2s orbital so, the electron can be easily removed from Li and has low ionisation energy.
• Among Br and F, Br has a larger size than F so, the electron can be easily removed from Br and has low ionisation energy.
• Among K and B, B has a 1 electron in 2p orbital whereas K has a half-filled 4s orbital so, the electron can be easily removed from K and has low ionisation energy.