Question

Observe the given table and answer the following questions

(Element Li Be B C N O F Ne

Ionization )

Energy

520.2 899.5 800.6 1086.5 1402.3 1313.9 1681 2080.7

1. Which element has highest ionization energy?

2. Which period these elements belongs to?

3. Why ionization energy increases from left to right?

4. Write the units for ionization energy​

Answer 1

Explanation:

1. Ne ( IE = 2080.7) has the highest ionising energy

2. These elements belong to the second period

3. Ionisation Energy increases from left to right because of decrease in atomic radius from left to right. As a result of this trend, the nucleus pulls the electron more forcefully, for which it becomes difficult to ionise the atom.

4. Unit of ionisation energy is kJ/mol (read as kilo joule per mole)