LIFE SCIENCE

Detailed explanation-1: -A molecule of carbon dioxide has 2 atoms (2 atoms of oxygen and 1 atom of carbon) in it.

Detailed explanation-2: -The carbon dioxide molecule is formed from one carbon atom and two oxygens. As an element, carbon only has 4 outer shell electrons and oxygen has 6. Double covalent bonds form between the atoms, where two electrons from each atom are shared making 4 bonding electrons in total.

Detailed explanation-3: -Carbon dioxide or CO2 is the chemical compound of two oxygen atoms and one carbon atom, at room temperature it is gaseous and is a vital gas for life in the atmosphere since it plays a major role in photosynthesis.

Detailed explanation-4: -Looking at the chemical formula of oxygen gas, we see that one molecule of oxygen gas contains two atoms of oxygen.

Detailed explanation-5: -Therefore the formula ( 2CO2 ) means there are two carbon-dioxide molecules.