Group 7

Question 1

also known as

Answer 1

Halogens

Question 2

group 7 elements need to be handled with care because they’re

Answer 2

TOXIC

Question 3

these elements are metals or non metals

Answer 3

NON metals

Question 4

All halogens have similar reactions as

Answer 4

they each have seven electrons in their outermost shell

Question 5

do the halogens have similar reactions

Answer 5

yes

Question 6

at room temp, fluorine is ___ and has what characteristics

Answer 6

Yellow gas and is very reactive and poisonous

Question 7

at room temp, chlorine is ___

and has what characteristics

Answer 7

a pale yellow green gas

reactive, poisonous and dense gas

Question 8

at room temp, bromine is ____

with what characteristics

Answer 8

a red brown liquid

dense, volatile

Question 9

at room temp, iodine is a ___

with what characteristics

Answer 9

grey solid

shimmery, crystalline solid that sublimes to form a purple vapour

Question 10

colour and state of bromine at room temp

Answer 10

Red-brown liquid

Question 11

colour and state of iodine at room temp

Answer 11

grey solid

Question 12

colour and state of chlorine at room temp

Answer 12

pale yellow / green gas

Question 13

colour and state of fluorine at room temp

Answer 13

yellow gas

Question 14

colour in solution of chlorine

Answer 14

pale green

Question 15

colour in solution of bromine

Answer 15

orange

Question 16

colour in solution of iodine

Answer 16

dark brown

Question 17

characteristics of iodine

Answer 17

Shimmery, crystalline solid that sublimes to form a purple vapour

Question 18

characteristics of bromine

Answer 18

dense red-brown volatile liquid

Question 19

characteristics of chlorine

Answer 19

reactive, poisonous and dense gas

Question 20

characteristics of fluorine

Answer 20

Very reactive, poisonous gas

Question 21

as you go down the group, the colour becomes

Answer 21

DARKER

Question 22

As you go down the group, density

Answer 22

INCREASES

Question 23

As you go down the group, melting and boiling points

Answer 23

INCREASE

Question 24

Physical properties of halogens change down the group (3)

Answer 24

• Darker in colour
• Melting and boiling points increase
• Density increases

Question 25

reactivity ___ as you go down the group

Answer 25

decreases

Question 26

why does reactivity decrease as you go down the group

Answer 26

the number of shells of electrons increases, meaning there are weaker electrostatic forces of attraction, making it harder to attract an electron to complete the outer shell

( because you want to gain an electron)

Question 27

halogens are what molecules

Answer 27

Diatomic

Question 28

all of the halogens have how many electrons on their outer shell

Answer 28

7

Question 29

if halogens react with non metals, they form

Answer 29

simple molecular covalent structures

Question 30

if halogens react with metals they form

Answer 30

ionic compounds ( metal halide salts)

Question 31

a displacement reaction is when

Answer 31

a more reactive halogen takes the place of a less reactive halogen

Question 32

what is a halide

Answer 32

an ion with a 1- charge

Question 33

halogens have the chemical formula

Answer 33

X₂

Question 34

explain why they get less reactive down the group

Answer 34

the number of shells of electrons increases, the same as with all other groups

This means that the increased distance from the outer shell to the nucleus as you go down a group makes the halogens become less reactive