Question

Which of the following gases effuses the fastest at a given temperature?

Ne

CH4

Ar

H2

Answer 1

\[KE = \frac{ 1 }{ 2 }mv^2\]
which means, the lightest gas moves the fastest. Which one is the lightest of your choices

Answer 2

Which choice is it?

Answer 3

You can look at your periodic table to figure that out.

Answer 4

H2, I already looked it up.