8.2 Group Properties & Trends

Question 1

Physical Properties of Group I Metals?

Answer 1

Soft and Easy to Cut (↑ as you go down)

Have shiny surfaces when freshly cut

Conduct heat & Electricity

Question 2

Chemical Properties of Group I Metals?

Answer 2

React w/ water to form alkaline solutions and hydrogen gas

Question 3

List 3 General trends of the Group I Metals as you move down the group

Answer 3

Melting point Decreases

Density Increases

Reactivity Increases

Question 4

What are the Group I Metals called?

Answer 4

Alkali Metals

Question 5

What are the Group VII elements Called

Answer 5

Halogens

Question 6

What does diatomic mean?

Answer 6

Form molecules of two atoms

Question 7

What are the state properties of halogens?

Answer 7

Physical state changes as you move down the group.

Cl₂ - Gas, Br₂ - Liquid, I₂ - Solid

Question 8

What are the reactivity properties of halogens?

Answer 8

Reactivity increases as you move up

Question 9

Colour of an aqeuous solution of Chlorine

Answer 9

Pale-green to colourless

Question 10

Colour of an aqeuous solution of Bromine

Answer 10

Orange, but yellow when diluted

Question 11

Colour of an aqeuous solution of Iodine

Answer 11

Brown

Question 12

What are the elements called between group 2 and 3?

Answer 12

Transition Elements

Question 13

What are the physical properties of transition elements?

Answer 13

Lustrous (shiny), hard & strong

Question 14

Transition elements form ions with ___ charges

Answer 14

Different (eg. Fe²⁺ & Fe³⁺)

Question 15

Transition elements are useful ____

Answer 15

Catalysts (eg. iron in Haber)

Question 16

Transition elements form __ compounds

Answer 16

Coloured

Question 17

What are the Group VIII Elements called?

Answer 17

The Noble Gases

Question 18

Why are Group VIII elements inert?

Answer 18

They have complete shells