Groups In Periodic Table

Question 1

Alkali metal and water

Answer 1

Metal hydroxide and hydrogen

Question 2

Properties of alkali metals

Answer 2

Soft, ductile, low density, low melting point compared to other metals, conductors, readily react with water

Question 3

Why do alkali metals readily react more the further down on the PT

Answer 3

More atomic radii. More shielding. Weaker force of attraction between positive nucleus and negative electron. Keen to be lost for stability

Question 4

Halogen and hydrogen

Answer 4

Hydrogen halide

Question 5

Halogen and metal

Answer 5

Metal halide

Question 6

Test for chlorine gas

Answer 6

Turns damp blue litmus paper red then bleaches white. Gas has to dissolve and react with the water. Hydrogen from the water makes hydrogen chloride which dissolves to make hydrochloric acid

Question 7

Fluorine

Answer 7

F. Gas. Pale yellow

Question 8

Chlorine

Answer 8

Cl. Gas. Pale green. Dense. Poisonous

Question 9

Bromine

Answer 9

Br. Liquid. Red orange. Dense. Poisonous

Question 10

Iodine

Answer 10

I. Solid. Purple grey. Crystalline

Question 11

Astetine

Answer 11

At. Solid. Black

Question 12

Property of hydrogen halides

Answer 12

Soluble

Question 13

Halogen reactivity

Answer 13

Higher up in the PT, more reactive. Outer shell is nearer positive nucleus so force of attraction is greater and attracts free electrons strongly. Also causes displacement reactions when reacted with a solution

Question 14

Inert

Answer 14

Chemically inactive

Question 15

Properties of noble gases

Answer 15

Colourless gases. Inert (chemically unreactive). Non-flammable. Low melting point poor conductor no charge so can’t carry current. Stable

Question 16

Argon uses

Answer 16

Filament bulbs. Non flammable. Stops burning away. Welding. Stops metal reacting with oxygen

Question 17

Helium uses

Answer 17

Balloons. Airships. Less density than air. Floats

Question 18

Pattern of properties in noble gases

Answer 18

Boiling point decreases. Density decreases. Further down PT

Question 19

Neon uses

Answer 19

Lights and signs. Conduct electricity and fluoresce when given high voltage (not current) - energy given off as light when electron moves up an energy level

Question 20

Krypton uses

Answer 20

Lasers and flash photography. Releases energy under high voltage capable of cutting mediums. Used to stop flash filament from burning away

Question 21

What happens to the melting point of the elements as you go down group 1?

Answer 21

It decreases. Because the metallic bonding is stronger at the top of the group

Question 22

What happens to the density of noble gases as you go down group 0?

Answer 22

It increases