# Question #ec927

Sep 13, 2017

Their distance in the periodic table...and...HCl (most bond polarity).

#### Explanation:

This table shows that electronegativity increases diagonally...

Or more appropriately this one...

Now, just imagine the Hydrogen to be somewhere near Boron, you can calculate the bond polarity.

Example Question (with real values on Pauling Scale) : -

1. ${N}_{2}$ (0) $\to$ Now way! They are the same atoms...
2. $B {H}_{3}$ (0.2) $\to$ Not Much... ( remember, I told you to imagine the Hydrogen to be somewhere near Boron )
3. $H C l$ (1.0) $\to$ Yeah... Quite Much...
4. $C {H}_{4}$ (0.4) $\to$ Bit more than $B {H}_{3}$....