Group 7 Recap

A group 7 element is a violet solid at room temperature. It is...

• Fluorine

• Bromine

• Chlorine

• Iodine

The reactivity of group 7 elements decreases down the group because...

• The atoms get smaller

• The outer shell of electrons is more shielded

• There are more protons in the nucleus

• Electrons are being lost more easily

Fluorine gas is bubbled through a solution of potassium iodide. The solution changes colour...

• From colourless to brown

• From brown to yellow

• Very little

• From colourless to yellow

The boiling points of group 7 elements increases as the group is descended because the ________ forces get stronger

A group 7 element is a red-brown liquid at room temperature. It is...

• Fluorine

• Iodine

• Chlorine

• Bromine

Adding chlorine gas to a solution of sodium bromide will result in...

• No colour change

• A colour change in the solution from colourless to orange

• A colour change in the solution from green to violet

• A colour change in the solution from orange to green

The correct balanced equation for the reaction that takes place when bromine is added to potassium iodide solution is

• No reaction

Group 7 elements are placed in an electrical circuit with a light bulb. When connected the light bulb does not light because...

• The electrons are all taken up in covalent bonds

• The ions cannot move

• Group 7 are poor electrical insulators

• The structure type is Giant Covalent

At room temperature, Astatine (if stable) would be...

• A colourless gas

• A black liquid

• A white solid

• A black solid

The alternative name for Group 7 is halogens which means 'salt-maker'. This is because...

• Group 7 lose electrons readily

• Group 7 elements readily gain electrons from metals

• Chlorine can form sodium chloride with sodium metal

• All of the other answers