Question

What do the following abbreviations stand for?

1- O

2- 2O

3-O2

4-3O2

Answer 1

1. $O$ stands for one oxygen atom.

2. $2O$ represents two oxygen atmos

3. $O_2$ stands fir oxygen molecule that is present in atmosphere

4. $3O_2$ stands for three oxygen molecule

Atom

• Atoms are defined as the basic building blocks of matter.
• It is the smallest constituent unit of matter that possess the properties of the chemical element.
• It is the smallest unit that retains the properties of an element.