Chapter 15, Problem 8TE

To determine

The approximate atomic mass and name of the element.

Answer to Problem 8TE

The atomic mass of the element is $99\text{amu}$ and name of the element is Technetium (Tc).

Explanation of Solution

Given info: The number of electrons of an atom is $43$, number of protons is $43$ and number of neutrons is 56.

Write the expression for the atomic mass of an element.

$A=p+n$

Here,

$p$ is the mass of protons

$n$ is the mass of neutrons

Substitute $43\text{amu}$ for $p$ and $56\text{amu}$ for $n$ in the above expression to get $A$.

$\begin{array}{c}A=43\text{amu}+56\text{amu}\\ =99\text{amu}\end{array}$

The atomic mass of the element is $99\text{amu}$and name of the element corresponding to this atomic mass is Technetium (Tc).

Conclusion:

Therefore, the atomic mass of the element is $99\text{amu}$ and name of the element is Technetium (Tc).