Chapter 4, Problem 1STP

Interpretation Introduction

Interpretation : The smallest particle of an element that retains its identity in a chemical reaction is to be identified.

Concept Introduction : Atoms are fundamental tiny particles that act as the building block of matter.

Answer to Problem 1STP

The smallest particle of an element that retains its identity in a chemical reaction is an atom. Option (C) is the correct answer.

Explanation of Solution

Reason for correct option:Atoms are fundamental tiny particles that act as the building block of matter. The smallest component of an element that maintains its identity during a chemical reaction is called an atom.

Most atoms have radii between $5\times {10}^{-11}\text{m}$ and $2\times {10}^{-10}\text{m}$ .

So, option (C) is the correct answer.

Conclusion

Reasons for incorrect options:Protons are the positively charged particles that make up an atom's nucleus. Neutrons are the neutrally charged particles that make up an atom's nucleus. When two or more elements are combined, compounds are created. Electrons, protons, and neutrons makeup an atom. The elements do not change during a chemical reaction.