periodic table

Question 1

how are elements in the periodic table arranged

Answer 1

atomic number

Question 2

why is the periodic table called this

Answer 2

elements either similar properties occur at regular properties

Question 3

why do elements in the same group have similar properties

Answer 3

they have the same number of electrons in their outermost shell

Question 4

how wrre elements arranged in the past

Answer 4

atomic weight

Question 5

what wete the problems with the early periodic table

Answer 5

not all of the elements had been discovered and when elements were placed in order of atomic weight they eneded up in the same group

Question 6

how did mendeleev overcome the problems of early periodic table

Answer 6

he left gaps for undiscovered elements and changed the order of some elements

Question 7

what tupe of ions do metals form

Answer 7

positive

Question 8

what type of ions do non metals form

Answer 8

negative

Question 9

where are netalsnfound on the periodic table

Answer 9

on the left and towards the bottom

Question 10

where are non metals found on the periodic table

Answer 10

on the right towards the top

Question 11

what are the elements in group 0 known as

Answer 11

noble gases

Question 12

why are elements in group 0 unreactive

Answer 12

the atoms have a stable arrangement of electrons, they have full outermast shells

Question 13

why are the elements in group 0 monotomic

Answer 13

they have a full shell and do not lose or gain electrons

Question 14

what happens to the bouling point down group 0

Answer 14

boiling point increases

Question 15

what are elements un group 1 known as

Answer 15

alkali metals

Question 16

what happens to reactivity down group 1

Answer 16

increases

Question 17

why does reactivity increase down group 1

Answer 17

down the group atoms get bigger, there is a weaker attraction between the nucleus and so it becomes easier to lose electrons

Question 18

what happens when a group 1 element reacts with oxygen

Answer 18

alkali metal + oxygen > metal oxide

Question 19

what happens if a group 1 reacts with chlorine

Answer 19

alkali metal + chlorine > metal chloride

Question 20

what happens if a group 1 reacts with water

Answer 20

alkali metal + water > metal hydroxide + hydrogen

Question 21

what are the elements in group 7 called

Answer 21

halogens

Question 22

what happens to the reactivity down group 7

Answer 22

decreases

Question 23

why does reactiviry decrease down group 7

Answer 23

down the getup the atoms getbbigger, there is a weaker attraction between the nucleus and so it becomes harder to lost electrons

Question 24

why are the halogens in group 7

Answer 24

they have 7 electrons in their outermost shell

Question 25

what colour vapour does fluorine have

Answer 25

yellow

Question 26

what colour vapour does chlorine have

Answer 26

green

Question 27

what colour bromine does bromine have

Answer 27

red-brown

Question 28

what colour vapour does iodine have

Answer 28

purple