Chapter 30, Problem 1STP

To determine

To Choose: The correct option.

Answer to Problem 1STP

Option $A$ is the correct answer.

Explanation of Solution

Given:

An element,

Nickel $-60Ni$

Where,

Atomic number $\left(Z\right)=28$

Atomic Mass number $\left(A\right)=60$

Formula used:

Number of protons is given by $\left(Z\right)$ .

Number of neutrons is given by $A-Z$ .

Number of electrons is given by $\left(Z\right)$

Where,

  $A$ : Atomic mass number of atom

  $Z$ : Atomic number of atom

Calculations:

For an element

Nickel $-60Ni$

Substitute the values of $A$ and $Z$ to find the number of protons, neutrons and electrons.

Here,

Number of electrons $Z=28$

Number of protons $Z=28$

Number of neutrons,

  $\begin{array}{l}A-Z=60-28\\ A-Z=32\end{array}$

Conclusion:

Thus, the option $A$ is correct.