Elements, Molecules, Compounds

Question 1

Note

Answer 1

Most chemicals in the body are in the form of molecules

Question 2

Molecules

Answer 2

Are particles of matter that are composed of one or more atoms. It’s the larger chemical unit of atoms

Question 3

Note to remember

Answer 3

Atoms usually unite with each other to form larger chemical units called molecules

Question 4

Chemical formula

Answer 4

Determines atoms present in a compound

Question 5

The formula for a compound contains..

Answer 5

Symbols that represent each element in the molecule

Question 6

Note to remember

Answer 6

The number of atoms of each element in the molecule is expressed as a subscript after the elemental symbol

For example; each molecule of the compound carbon dioxide has one carbon (C) atom and two oxygen (O) atoms; thus its molecular formal is CO2