C2 The periodic table

Question 1

why are the noble gases unreactive

Answer 1

they have a full outer shell

Question 2

why are group 1 metals called alkali metals

Answer 2

when reacted with water they form an alkaline solution

Question 3

does the melting and boiling point decrease or increase going down the group in group 1

Answer 3

the melting and boiling point DECREASE (lithium has a higher melting point then sodium)

Question 4

does the melting and boiling point decrease or increase going down the group in group 7

Answer 4

they increase going down the group

Question 5

does the reactivity decrease or increase going down the group in group 1

Answer 5

increase

Question 6

does the reactivity decrease or increase going down the group in group 7

Answer 6

decrease

Question 7

what are some of the physical properties of transition elements

Answer 7

good conductors of electricity and thermal energy
hard and strong
high densities
high melting points (except mercury)

Question 8

who was one of the first people who made suggestions about the periodic table

Answer 8

John dalton

Question 9

what did john dalton do to arrange the period table

Answer 9

he arranged the discovered elements in order of their atomic weight

Question 10

what did newlands do to arrange the periodic table differently

Answer 10

he noticed that properties of every eighth element seemed similar
he didn’t leave gaps for undiscovered elements so not all the placings made sense.
he arranged in order of mass still

Question 11

what did mendeleev do to when arranging the period table

Answer 11

he left gaps for unknown elements and made predictions for what the unknown elements properties would be