   Chapter 2, Problem 16PS

Chapter
Section
Textbook Problem

Naturally occurring silver exists as two isotopes having mass numbers 107 and 109. How many protons, neutrons, and electrons are there in each of these isotopes?

Interpretation Introduction

Interpretation:

The numbers of protons, neutrons and electrons in two naturally occurring silver are needed to be determined, if mass number of isotopes are 107 and 109.

Concept introduction:

• The atomic number of silver is 47
• Equation for mass number is,

massnumber=numberofprotons+numberofneutrons

• The numbers of protons and electrons are equal in an atom.
• The number of protons and electrons for different isotopes are equal.
Explanation

The atomic number of silver is 47.

The numbers of protons and electrons are equal in an atom.

The number of protons and electrons for different isotopes are equal.

Therefore,

The numbers of protons and electrons in two naturally occurring silver are equal (that is 47).

The mass numbers of isotopes are given as 107 and 109.

Equation for mass number is,

massnumber=numberof

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