Name a monoatomic gas ? What is its valency ?

What is valence band ?

Calculate the final temperature of a monoatomic idal gas that is compressed reversible and adiabatically from 16L to 2L at 300 K :

An element has Z = 7. What is the valency of the element ? Also name the element.

What is the final temperature of 0.10 mole monoatomic ideal gas that performs 75 cal of work adiabatically.if the initial temperature is 227 ^(@)C ( use R=2 cal //K-mol)

Write scientifc name of lactic acid bacteria. What is its advantage?