What is the formula for a compound formed between na and n ?

Na₃N

Explanation:

The compound made by sodium and nitrogen is called sodium nitride.

The oxidation state of sodium is +1 it loses its one valance electron and get complete octet while nitrogen have five valance electrons it require three more electron to gain stability.

When it react with sodium it needed three electron that's why three sodium atom are react with one nitrogen atom to make the compound overall neutral.

Na⁺    N³⁻

Na₃⁺³N³⁻

Chemical equation:

6Na + N₂  → 2Na₃N

however this compound us unstable and decompose to gives nitrogen and sodium.

Chemical equation:

2Na₃N  →   6Na + N₂

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.