Chapter 17, Problem 18STP

Interpretation Introduction

Interpretation:

With the help of graph, the approximate ionization energy value of the element which having the atomic number 7 is to be explained.

Concept introduction:

The ionization energy is the amount of energy which is required to remove the electron form the outermost shell.

Answer to Problem 18STP

Correct answer: option (d) 340Kcal/mol is correct.

Explanation of Solution

The ionization energy is minimum amount of energy which is required to remove the electrons from the outermost shell. It is represented in kJ/mol.

With the help of graph, at the atomic number 7 along x-axes, the value of ionization energy is below 350 or approximately equal to 340 kcal/mol.

Conclusion

Reasons for incorrect options:

For A: The ionization energy $\text{300}$ Kcal/mol corresponding to the atomic number 8.

For B: The ionization energy $\text{310}$ Kcal/mol corresponding to the approximate nearly the atomic number 8.

For C: The ionization energy $\text{325}$ Kcal/mol corresponding to the atomic number which lies between 8 and 9.

For E: The ionization energy $\text{390}$ Kcal/mol corresponding to the atomic number approximate equal to 9.