C2-9 Group 7 Elements

For group 7 elements which box/s is/are correct?

[Select all that are correct]

• Fluorine is a pale yellow gas

• Chlorine is an green liquid

• Bromine is an orange liquid

• Iodine is a black liquid

Which halogen is a liquid at room t temperature and pressure?

• Fluorine

• Chlorine

• Bromine

• Iodien

What is the trend in reactivity as you go down group 7?

• Increases

• Decreases

• Stays the same

• No trend onbserved

All halogens are diatomic. What does this mean?

• Very reactive element

• Reacts with water to produce hydrogen gas

• Two atoms in a covalent bond

• Displacement reactions occur readily down the group

Why do halogens become less reactive down the group?

• To react halogens need to attract an outer electron, this is harder when the shell is further from the oppositely charged nucleus

• To react halogens need to lose one outer electron, this is easier when the shell is further from the oppositely charged nucleus

• To react halogens need to lose an outer electron, this is harder when the shell is further from the positively charged nucleus

• To react halogens need to attract an outer proton, this is harder when the shell is further from the positively charged nucleus

Which of the following displacement reactions are correct?

[Tick all that apply]

• Cl2 + 2Br-

  ->

  Br2 + 2Cl-

• Iodine will displace chlorine

• I2 + 2Br-

  ->

  Br2 + 2I-

• Bromine will displace iodine

Which of the following displacement reactions are correct for the reaction of chlorine with bromide?

[Tick all that apply]

• Cl2 + 2Br-

  ->

  Br2 + 2Cl-

• Bromine will displace chlorine

• Bromine becomes bromide

• Chlorine becomes chloride

Which of the following displacement reactions are correct for the reaction of bromine with iodide?

[Tick all that apply]

• A brown colour will be observed

• Br2 + 2I-

  ->

  I2 + 2Br-

• Bromine becomes bromide

• Bromine loses electrons

Which box is correct?

• 
• 
• 
• 

What goes in the missing box?