Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > 4.2 - Group 7 > Flashcards

4.2 - Group 7 Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

Colour, State and formula of Fluorine

A

Very pale yellow, gas, F2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Colour, State and formula of Chlorine

A

Pale green, gas, Cl2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Colour, State and formula of Bromine

A

Brown, liquid, Br2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Colour, State and formula of Iodine

A

Dark Grey, Solid, I2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Colour, State and formula of Astatine

A

Black, solid, At2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What do halogens form when they react with metals

A

Ionic compounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Define ionic bonding

A

The strong electrostatic attraction between a positive and negative ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Define covalent bonding

A

The strong electrostatic attraction between a pair of shared electrons and the positive nuclei

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What kind of reaction is a reaction between a metal and a halogen

A

Redox reaction
(Metal loses electrons)
(Halogen gains electrons)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In a reaction with a metal what does the halogens name change to

A

Halogen -> Halide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Fill the Gap
Halogens get …. Reactive down the group

A

Less

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Fill the Gap
Colours get …. Down the group

A

Darker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Fill the Gap
Boiling/melting point …. Down the group

A

Increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Fill the Gap
All halogen atoms need to …. An electron to fill their ….

A

Gain, outer shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why is it more difficult for a halogen to gain an electron as you go down the group

A

Atoms have more electron shells
The extra electron is further away from the nucleus
So its attraction to the nucleus is weaker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Why is it easier for a metal to lose an electron as you go down the group

A

Atoms have more electron shells
The extra electron is further away from the nucleus
So its attraction to the nucleus is weaker and can be lost easier

17
Q

What does the group show on the periodic table

A

Number of electrons in outer shell
(The electrons GROUP together)

18
Q

What does the period show on the periodic table

A

The number of electron shells

19
Q

What does the period show on the periodic table

A

The number of electron shells

20
Q

Test for chlorine

A

Damp blue litmus paper in gas turns white
Because chlorine acts as a bleaching agent so it removes the colour from the paper

21
Q

Fill the Gap
…reactive halogens can displace … reactive halogens from their compounds

A

More, less

22
Q

What colour is aqueous (aq) Chlorine and what is it

A

Colourless
Halogen

23
Q

What colour is aqueous (aq) Bromine and what is it

A

Yellow
Halogen

24
Q

What colour is aqueous (aq) Bromine and what is it

A

Yellow
Halogen

25
Q

What colour is aqueous (aq) Iodine and what is it

A

Brown
Halogen

26
Q

What colour is aqueous (aq) KCl (Potassium Chloride) and what is it

A

Colourless
Salt

27
Q

What colour is aqueous (aq) KBr (Potassium bromide) and what is it

A

Colourless
Salt

28
Q

What colour is aqueous (aq) KI (Potassium Iodide) and what is it

A

Colourless
Salt

29
Q

KCl + Cl2

A

No change
Stays colourless

30
Q

KCl + Br2

A

No change
Bromine cannot displace chlorine
Stays yellow

31
Q

KCl + I2

A

No change
Iodine cannot displace chlorine
Stays brown

32
Q

KBr + Cl2

A

Cl2 + 2KBr —> Br2 + 2KCl
Chlorine displaces bromine
Colourless -> Yellow

33
Q

KBr + Br2

A

No change
Stays yellow

34
Q

KBr + I2

A

No change
Stays brown

35
Q

KI + Cl2

A

Cl2 + 2KI —> I2 + 2KCl
Chlorine displaces iodine
Colourless -> brown

36
Q

KI + Br2

A

Br2 + 2KI —> I2 + 2KBr
Bromine displaces iodine
Yellow -> brown

37
Q

KI + I2

A

No change
Stays brown

38
Q

Fill the gap
Displacement occurs in the three cells becuase the halogen added is …. Reactive than the halogen present in the …

A

More, salt

39
Q

True/False
The reactivity trend in halogen is Chlorine > Bromine > Iodine > etc

A

True

Chemistry (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions