4.3.1 - Halogen Elements

Question 1

What bonding do HALOGENS use !?

Answer 1

. Halogens (group 7 elements) are COVALENTLY bonded, SIMPLE MOLECULAR substances

Question 2

All Halogens are…

Answer 2

. Diatomic

Question 3

As you go down group 7 (Halogens)…

Answer 3

. Colours get DARKER

. MP/BP Increases

Question 4

Fluorine colour and state at room temperature :

Answer 4

. Very pale yellow🟨

. Gas

Question 5

Chlorine state and colour at room temperature :

Answer 5

. Pale green🟩

. Gas

Question 6

Bromine state and colour at room temperature :

Answer 6

. Brown🟫

. Liquid ( Volatile, releases brown fumes)

Question 7

Iodine state and colour at room temperature:

Answer 7

. Dark grey🌚

.solid (sublimes, releases purple fumes)

Question 8

Astatine colour and state at room temperature:

Answer 8

. Black⬛️

. Solid

Question 9

What happens when HALOGENS react with METALS !?

Answer 9

. When they react with metals, halogens form IONIC compounds

Question 10

What is the transfer of electrons between a Metal and a Halogen!?

Answer 10

. In this reaction, the OUTER-SHELL ELECTRONS from the metal are TRANSFERRED to the halogen

Question 11

What kind of reaction is METAL + HALOGEN !?

Answer 11

. A redox reaction

Question 12

Why is the reaction METAL + HALOGEN a REDOX reaction !?

Answer 12

. Na loses electrons= oxidised

. Cl gains electrons= reduced

Question 13

What is the reactivity trend for HALOGENS !?

Answer 13

. Halogens get LESS REACTIVE DOWN THE GROUP

Question 14

Do halogens gain or loses an electron!?

Answer 14

. All halogen atoms NEED TO GAIN AN ELECTRON to fill their outer shell

Question 15

Why do Halogens get less reactive as you go down the group !?

Answer 15

. Atoms have MORE ELECTRON SHELLS

. The extra electron is FURTHER FROM THE NUCLEUS

. So it’s ATTRACTION TO THE NUCLEUS IS WEAKER

Question 16

What is the CHEMICAL test for Chlorine !?

Answer 16

. Damp BLUE🟦 litmus paper➡️ turns white ⬜️