C2.4 Groups In The Periodic Table

Question 1

What are the two properties of transition metals?

Answer 1

They create coloured compounds and they have a high melting point

Question 2

What are some uses of transition metals?

Answer 2

Oil paints, wall paints, fireworks

Question 3

What electrons create the ‘sea of electrons’ in a transition metal?

Answer 3

Delocalised electrons

Question 4

Why are transition metals malleable?

Answer 4

The sea of electrons allows positive ions to flow over each other, which dents the metal, rather than breaking it

Question 5

What group are the transition metals on the periodic table?

Answer 5

Group 3

Question 6

Why can transition metals conduct electricity?

Answer 6

If current is applied, then the delocalised electrons all drift in one direction.

Question 7

What group are the Alkali metals in?

Answer 7

Group 1

Question 8

Alkali metals react with water to get a what?

Answer 8

Alkali

Question 9

Does the reactivity is group 1 increase or decrease as you go down the group?

Answer 9

It increase up to Caesium, as Francium has no stable isotype

Question 10

What are the properties of alkali metals?

Answer 10

Extremely reactive with water, very soft and they have low boiling points.

Question 11

Why is Caesium more reactive than lithium?

Answer 11

The outer electron that Caesium needs to lose to become electronically stable is further away from the nucleus. The electron is not held as strongly in Caesium as it is furthest from the nucleus, so the nucleus’ gravity is weakest. The reaction occurs when the outer electron is lost. This is called electron shielding.

Question 12

In what group are the Halogens?

Answer 12

Group 7

Question 13

At room temperature, what are the states of matter of the halogens?

Answer 13

Fluorine and Chlorine are gases, bromine is a liquid and iodine and Astatine are solids.

Question 14

What is special about the reactivity of the halogens?

Answer 14

As you go down the group, the reactivity decreases. Therefore fluorine is the most reactive and Astatine is the least reactive.

Question 15

What do halogens react with?

Answer 15

They react with metals to form metal halides.

Question 16

What is a use of halogens?

Answer 16

To put into tungsten light bulbs

Question 17

What group are the noble gases in?

Answer 17

Group 8

Question 18

What is the reactivity of Noble Gases?

Answer 18

They are all extremely unreactive as they are electronically stable as the have a full outer shell of electrons. However, noble gases to react with high voltages to make different colours.

Question 19

What are the uses of Noble gases?

Answer 19

Helium- filling balloons and airships 
Neon- Fluorescent lamps 
Argon- In wielding, fire-extinguishing
Krypton- Fluorescent lamps
Xenon- Formerly used in filament lamps

Question 20

Why are the noble gases so useful?

Answer 20

Because they are so unreactive?

Question 21

Why do elements with a full outer shell not react?

Answer 21

They are electronically stable- other element react to become electronically stable.

Question 22

What are the properties of metals?

Answer 22

They are good conductors of heat and electricity, malleable, insoluble and the atoms are held together through metallic bonding.