Chapter 4, Problem 45A

Interpretation Introduction

Interpretation : The charge, positive or negative, of the nucleus of every atom is to be identified.

Concept Introduction : The smallest component of an element that maintains its identity during a chemical reaction is called an atom.

Answer to Problem 45A

The charge is positive on the nucleus of every atom.

Explanation of Solution

The nucleus of any atom contains protons and neutrons while electrons revolve around the nucleus.

The positively charged subatomic particles known as protons were first found in the nucleus by Eugen Goldstein.

James Chadwick first identified the neutrally charged subatomic particles known as neutrons as also being present in the nucleus.

Since only protons have a positive charge in the nucleus, the charge of the nucleus of every atom is positive.