Chapter 3, Problem 1PL

The most basic unit of matter is

1. energy.
2. an element.
3. a molecule.
4. a cell.

Summary Introduction

Introduction:

Any substances that have their own mass and take up space are called a matter. All the atoms, as well as compounds, are composed of a small unit of the matters, whereas matters are consist of elements that have particular physical and chemical properties. It cannot be converted into simpler substances by using a normal chemical reaction. For example, gold and carbon is an element.

Answer to Problem 1PL

Correct answer:

The correct answer is option (b) an element.

Explanation of Solution

Explanation/justification for correct answer:

Option (b). An element. It is a substance that has the same number of protons or has the same atomic number. They are the simplest substance that cannot be broken down into smaller substances. They can only be converted into other elements by using the nuclear method. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a). Energy. It is defined as the capacity of the body or any other physical system to do work. The energy of the system remains constant though it can be transferred from one form to another. Energy cannot be created and destroyed. So, this is an incorrect option.

Option (c). Molecule. A molecule is made up of atoms that are chemically bonded with each other. They are the smallest particle of an element or compound. So, this is an incorrect answer.

Option (d). Cell. The cell is the structural and functional unit of life. It is the basic membrane-bound unit that has fundamental molecules. So, this is an incorrect answer.