Chemistry

$\mathrm{}{V}_{rms}>V_{av}>V_{mp}$

$\mathrm{C}\mathrm{l}>\mathrm{F}$   (exception)

$\mathrm{S}>$ Se (size effect)

$\mathrm{L}\mathrm{i}>\mathrm{N}\mathrm{a}$   (size effect)

$\mathrm{}{\mathrm{N}}_2+{\mathrm{O}}_2?2\mathrm{N}\mathrm{O}$

Oxidation state changes

You can check the below given table for the comarative differences between valence bond theory and molecular orbital theory.

$6\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}+3{\mathrm{C}\mathrm{l}}_2?5\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{l}+{\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{l}\mathrm{O}}_3+3{\mathrm{H}}_2\mathrm{O}$

$2\mathrm{C}\mathrm{a}(\mathrm{O}\mathrm{H}{)}_2+{\mathrm{C}\mathrm{l}}_2?\mathrm{C}\mathrm{a}(\mathrm{O}\mathrm{C}\mathrm{l}{)}_2+{\mathrm{C}\mathrm{a}\mathrm{C}\mathrm{l}}_2+{\mathrm{H}}_2\mathrm{O}$

Photochemical smog generally does not content SO₂ gas.

$B{r}_2+5F_2\left(excess\right)\to 2Br{F}_5$

$Br{F}_5+3H_{2}O\to HBr{O}_3+5HF$

$2B{F}_3+6NaH\to B_2{H}_6+6NaF$

$B_2{H}_6+2\ddot{N}{\left(Me\right)}_3\to 2H_{3}B\leftarrow :N{\left(Me\right)}_3$

Density of metal a very specific and depends upon many factors.

Li -> 0.53 gm/cm³

Na -> 0.97 gm/cm³

K -> 0.86 gm/cm³

Rb ->1.53 gm/cm³

Cs -> 1.90 gm/cm³