Chapter 4, Problem 4.123CQ

Interpretation Introduction

Interpretation:

a. How many protons, neutrons, and electrons are in ${}_{82}{}^{208}Pb$?

b. What is the atomic symbol of other isotopes of lead with 132 neutrons?

c. What is the name and symbol of an atom with the same mass number as in part b and 131 neutrons? ”

Should be explained

Concept introduction:

► Isotopes: The atoms of an element with different mass number or atomic mass are called isotopes. They have same number of protons and electrons but different number of neutrons. Therefore it is not necessary the all atoms of a given element contain the same number of neutrons in their nuclei. For example hydrogen has three isotopes ${\text{H}}^{\text{1}}{\text{, H}}^{\text{2}}{\text{,H}}^{\text{3}}$ with 0, 1 and 2 neutrons in their nuclei respectively.