shapes and polarity

Question 1

Structure: N

Answer 1

Number of electron clouds around the centre atom

Question 2

Structure: R

Answer 2

The electrons mutually repel around the center atom

Question 3

Structure: P

Answer 3

Parent shape

Question 4

Structure: A

Answer 4

The bond angle

Question 5

Structure: L

Answer 5

Number of electron clouds which are lone pairs and number which are bond pairs

Question 6

Structure: S

Answer 6

Final shape

Question 7

Shape: 2 regions

Answer 7

Linear ( 180)

Question 8

Shape: 3 regions

Answer 8

No lone pairs - trigonal planar (180)
One lone pair - bent 3 (119)

Question 9

Shape: 4 regions

Answer 9

No lone pairs - tetrahedral ( 109.5)
One lone pair - trigonal pyramid (107)
Two lone pair - bent 4 ( 104.5)

Question 10

Polarity structure:

Answer 10

Every Single Reindeer can Party

Question 11

Polarity structure: E

Answer 11

Polar bonds are created by the electronegativity between two atoms ( state which is more electronegative)

Question 12

Polarity structure: S

Answer 12

Polar bonds are symmetrically/asymmetrically arranged

Question 13

Polarity structure: R

Answer 13

The reason for symmetry/ asymmetry
They must: all the outside atoms must be the same AND the center atom must be in the center of all the outsides atoms

Question 14

Polarity structure: C

Answer 14

So the polar bonds cancel/ don’t

Question 15

Polarity structure: P

Answer 15

So the molecule is polar/ non-polar

Question 16

Ionic solid description

Answer 16

Ionic solids are made of ions connected by strong ionic bonds.
- High melting point
- Cannot conduct electricity
- Soluble in polar
- Hard and brittle

Question 17

Metallic solid description

Answer 17

Metallic solids are made of metallic atoms connected by a strong metallic bond.
- High melting point
- Not soluble ( made of atoms which have no charge)
- Conducts electricity ( have free moving valence electrons that allow a charge to be carried)

Question 18

Molecular

Answer 18

Molecular solids are made up of molecules connected by a weak intermolecular bond
- low melting point
- cannot conduct electrcity
- soft/ flexible or may be brittle ( but not hard)