Chapter 2, Problem 20QRT

Interpretation Introduction

Interpretation:

The number of electrons, protons and neutrons present in atom of Cobalt $\text{-60}$ has to be found.

Concept Introduction:

Electrons:

Electrons are constituents of atom and it is the negatively charged subatomic particle.  It is known as the elementary particle because it cannot be broke down into smaller particles.

Charge of the electron $\text{= -1}{\text{.6×10}}^{\text{-19}}\text{ C}$.

Mass of the electron $\text{= 9}{\text{.1×10}}^{\text{-28}}\text{ g}$.

Protons:

Hydrogen atoms had the smallest mass to charge ratios, indicating that they must be the fundamental positively charged particles of atomic structure.  Such a particle is called a proton. 

Charge of the proton $\text{=1}{\text{.6×10}}^{\text{-19}}\text{ C}$.

Mass of the proton $\text{= 1}{\text{.67 × 10}}^{\text{-24}}\text{ g}$.

Neutrons:

It is a sub-atomic particle in an atom which is having neutral charge.  They are not positive like protons.