3.6 structure of simple molecules

Question 1

What is a limitation of a 2d ball and stick model

Answer 1

it shows all angles as 90 degrees but some aren’t

Question 2

what is a limitation of a 3d ball and stick model

Answer 2

it’s hard to see the shape of the molecule

Question 3

what is a good thing about the molecular model kit

Answer 3

you can see the 3d shape of the molecule

Question 4

what is a limitation of the dot and cross diagram

Answer 4

shows the electrons as being different, but they are actually all the same

Question 5

what’s a problem with all diagrams on paper

Answer 5

the electrons are in fixed positions, but scientists believe that electrons in covalent bonds are constantly moving

Question 6

what is a limitation with diagrams of giant lattices

Answer 6

can’t reflect the millions of atoms bonded together in giant lattices

Question 7

what is a good thing about diagrams of giant lattices

Answer 7

they show the correct ratio of each element

Question 8

intermolecular forces def

Answer 8

the attraction between the individual molecules in a covalently bonded substance

Question 9

what happens to intermolecular forces as the molecule gets bigger

Answer 9

the intermolecular forces get bigger

Question 10

polymers def

Answer 10

a substance made from very large molecules made up of many repeating units

Question 11

do compounds made up of simple molecules conduct electricity

Answer 11

no, even when molten or dissolves in water, unless they react with water to form aqueous ions as acid molecules do

Question 12

why do simple molecules in a compound not conduct electricity

Answer 12

because there is no overall charge