Shapes

Question 1

2 bonding

Answer 1

linear 180 straight line

Question 2

three bonding

Answer 2

trigonal planar, 120 equilateral triangle

Question 3

four bonding

Answer 3

tetrahedral 109.5 one up, one a bit right, wedge down, dashes a bit left

Question 4

three bonding one lone

Answer 4

trigo al pyramidal, 107, same as tetrahedral but lone goes uo

Question 5

two bonding two lone

Answer 5

bent, 104.5, cross with top two lone

Question 6

six bonding

Answer 6

octahedral 90 top dashes bottom wedges vertical lines

Question 7

electronegativity

Answer 7

relative tendency of an atom in a covalent bond to attract electrons in the covalent bond to itself

Question 8

what makes electronegativity increase:

Answer 8

proton/charge increase, atomic radius decrease (across period) and shielding decrease (up a group)

Question 9

what’s a polar covalent molecule

Answer 9

covalent but with dipoles

Question 10

symmetric molecules

Answer 10

all bonds are identical and there aren’t any lone pairs as dipoles cancel out with no net dipole moment

Question 11

electronegativity difference above 1.8=

Answer 11

ionic bond

Question 12

why do like pairs repel more

Answer 12

as electrons are only in one atom the charge density is greater