Chapter 4.1, Problem 2SSC

Interpretation Introduction

Interpretation:  The term atom needs to be defined in own words.

Concept introduction:  Atom is the building block of a matter. It can be further divided into 3 subatomic particles namely protons, electrons and neutrons.

Answer to Problem 2SSC

The smallest particles of elements are called atoms. The atom makes up every single object. The air and a chair both are made up of atoms.

Explanation of Solution

The basic building of matter is atoms. There are 90 natural types of atoms and 25 lab-forming atoms.

The atoms are made up of three basic particles are protons, neutrons, and electrons.

Protons: carry a positive charge

Neutrons: carry no charge

Electrons: carry a negative charge

The nucleus is a central particle of atoms, which make up by joining protons and neutrons.

Conclusion

1. Atom is the unit of matter.
2. Atom is the smallest particle of elements.
3. Atoms contain particles called protons, electrons, and neutrons.