Chapter 28, Problem 58GP

To determine

The number of elements found in the nature.

Answer to Problem 58GP

  $86$

Explanation of Solution

Given info:

Number, $\text{n}$ , is limited to the range from $\text{1}$ to $\text{6}$ .

Formula used:

The principal quantum number $n$ can take on any integer value $\left(1,2,3,\mathrm{...}\right)$ and also, corresponds to the quantum number of the old Bohr Theory.

Calculation:

Limiting the number of electron shells to $6$ would mean that the periodic table stops with radon (the next element), francium begins filling the $\text{7th}$ shell.

Hence, including all elements up through radon means $\text{86}$ elements.

Conclusion:

The required value is $\text{86}$ .