Properties & trend in reactivity of halogens

Question 1

State the colour of Fluorine and state

Answer 1

gass, yellow

Question 2

state the colour of chlorine and state

Answer 2

gass, green

Question 3

state the colour of bromine and state

Answer 3

liquid, red-brown liquid, orange/brown vapour

Question 4

state the colour of iodine and state

Answer 4

solid, grey solid, purple vapour

Question 5

what are the properties of halogens

Answer 5

• Melting and boiling points increase down the group: Mp and Bp increase as the relative molecular mas increases. As the relative molecular mass increases, the intermolecularforces of atraction become stronger, so more enegy has to be put in to overcome these stronger forces of attraction
• Poor ocnducters of heat & electricity (NON-METALS)

Question 6

What is the trend in reactivity

Answer 6

• When halogens react, they form 1- ions
• if it is in a shell closer to the nucleus it is more strongly attracted to the nucleus
• If an element is more close to the nucleus, they have a stronger tendency to gain a electron