Electronegativity

Question 1

Which shapes are non-polar?

Answer 1

1. linear
2. tetrahedral
3. octahedral
4. trigonal planar

Question 2

What is meant by electronegativity?

Answer 2

The power of an atom to be able to attract a pair of electrons in a covalent bond.

Question 3

What happens to electronegativity across a period?

Answer 3

-Increases
-Atomic radius decreases
-Nuclear charge increases
-The bonded electrons are attracted to the power of the nucleus

Question 4

What happens to electronegativity down the group?

Answer 4

-Decreases
-Atomic radius increases
-Shieling increases
-bonded electrons are not attracted to the power of the nucleus

Question 5

What makes a bond polar?

Answer 5

The atoms do not cancel each other so they end up with an overall dipole

Question 6

Which shapes are polar?

Answer 6

-non linear
-square planar
-pyramidal

Question 7

Why are bonds non-polar?

Answer 7

Atoms are arranged symmetrically so the dipoles will act in all directions and cancel each other out to become non polar

Question 8

Why do polar bonds have a permanent dipole?

Answer 8

They have very different electronegativities so they cannot cancel each other out resulting in an overall dipole which leads to a permanent dipole