groups in the periodic table

Question 1

collums are called

Answer 1

groups

Question 2

rows are called

Answer 2

periods

Question 3

elements with similar properties are arranged in the same

Answer 3

group

Question 4

elements in the same group have the same number of…

Answer 4

electrons in their outer shell

Question 5

elements in the same period have the same

Answer 5

number of electron shells

Question 6

group 1

Answer 6

alkali metals

Question 7

properties of alkali metals

Answer 7

1 outer electron
can react with oxygen, chlorine and water
Soft

Question 8

how does the reactivity of the group 1 elements change down the group and why

Answer 8

reactivity increases down group 1
atoms get bigger
more shells so outer electron further away
electrostatic attraction weaker
easier to lose the outer electron

Question 9

metal + water

Answer 9

metal hydroxide + hydrogen

Question 10

what is observed when alkali metals react with water

Answer 10

fizzing - hydrogen gas forming
solid disappears - metal gets used up

Question 11

group 7

Answer 11

halogens

Question 12

halogen properties

Answer 12

7 outer electrons
non metals
molecules made of pairs of atoms (diatomic)

Question 13

how does the reactivity of the group 7 elements change down the group and why

Answer 13

decreases
atoms get bigger
more shells
electrostatic weaker
harder to gain an electron to fill shell

Question 14

how does the melting and boiling point of halogens change down the group and why

Answer 14

increases
molecules increase in size
intermolecular forces become stronger
more energy required to overcome the forced of attraction

Question 15

state at room temp of group 7 (fluorine chlorine bromine iodine)

Answer 15

fluorine - gas
chlorine - gas
bromine - liquid
iodine - solid

Question 16

appearance of fluorine at room temperature

Answer 16

yellow gas

Question 17

appearance of chlorine at room temperature

Answer 17

yellow - green gas

Question 18

appearance of bromine at room temperature

Answer 18

red- brown liquid

Question 19

appearance of iodine at room temperature

Answer 19

grey solid

Question 20

colour in solution chlorine

Answer 20

pale green

Question 21

colour in solution bromine

Answer 21

orange

Question 22

colour in solution iodine

Answer 22

dark brown

Question 23

halogen + metals =

Answer 23

salt

Question 24

halogens + hydrogen

Answer 24

hydrogen halides

Question 25

hydrogen halides are...

Answer 25

gases at room temp and dissolve to form acidic solutions

Question 26

chlorine + potassium bromide

Answer 26

chlorine displaces bromide ions br2 is formed - orange colour

Question 27

bromine + potassium chloride

Answer 27

no reaction

Question 28

iodine + potassium chloride

Answer 28

no reaction

Question 29

iodine + potassium bromide

Answer 29

no reaction

Question 30

chlorine + potassium iodide

Answer 30

chlorine displaces iodide ions iodine is formed (brown)

Question 31

bromine + potassium iodide

Answer 31

bromine displaces iodide ions iodine is formed - brown

Question 32

test for chlorine

Answer 32

damp blue litmus paper will be bleached

Question 33

group 0

Answer 33

noble gases

Question 34

reactivity of noble gases and why

Answer 34

very low - unreactive they have a full outer shell

Question 35

how does boiling point change down the group of noble gases

Answer 35

it increases

Question 36

properties of noble gases

Answer 36

low densities inert not flammable

Question 37

properties and uses of helium

Answer 37

less dense than air and non flammable - balloons and airships

Question 38

argon properties and uses

Answer 38

denser than air and inert - used as a "shield gas" when welding pieces of metal together the fact that it is denser than air prevents air getting to the metal and its inertness stops the metal oxidising