Chapter U1.12, Problem 1E

Interpretation Introduction

Interpretation:

The significance of atomic number should be stated.

Concept introduction:

Atoms are the tiny particles made up of electrons, protons and neutrons. They cannot be seen with naked eyes.

Answer to Problem 1E

Atomic number represents the number of protons in nucleus of an atom and number of electrons in a neutral atom. It is identity of an atom.

Explanation of Solution

Atomic number is equal to the number of the protons in an atom and the number of protons are identify of an atom of element. No two elements can have same number of protons. In other words, it tells the number of protons in nucleus of an atom and number of electrons in neutral atom.

Conclusion

Atomic number represents the number of protons in nucleus and it is identity of an atom.