Class 9 Science | Nitrogen Gas

Science and Technology, Class 9 · Unit 16

Nitrogen Gas

The biggest part of air · Making and testing it · Properties and uses

By the end of this lesson you can

🔍

say who found nitrogen and where it occurs

⚗️

describe its laboratory preparation

🧪

test a gas for nitrogen

📋

link its properties to its uses

1772: Daniel Rutherford finds an unreactive gas

1790: Chaptal names it nitrogen

Today: about 78 percent of air, and in proteins and DNA

The notes are free to read in full.

Presenter notes: Today we study the gas that makes up most of every breath we take, even though our body never uses it.