Topic 6 - Groups In The Periodic Table

Question 1

Properties of alkali metals

Answer 1

Low Melting point

Very soft

Question 2

Group 1 reactivity

Answer 2

Readily lose single electron.

As atomic radii increases with shielding its attraction to the nuclei decreases.

Question 3

Alkali metal + cold water.

Answer 3

Hydroxide + Hydrogen

Question 4

Chlorine properties

Answer 4

Toxic, green gas

Question 5

Bromine reactions

Answer 5

Toxic

Red-brown liquid and gives off orange vapour

Question 6

Iodine

Answer 6

Grey solid, purple vapour

Question 7

Test for chlorine

Answer 7

Damp blue litmus paper is bleached. (May turn red as it is acidic)

Question 8

Reactivity and halogens

Answer 8

Lower radii gives a greater attraction to attract electrons.

Question 9

Halogens + metal

Answer 9

Metal halide (salt)

Question 10

Halogen + Hydrogen

Answer 10

Hydrogen Halide (salt)

Question 11

Displacement and halogens

Answer 11

More reactive will displace.

Question 12

Features of a noble gas

Answer 12

Inert, colourless, non-flammable, hard to observe

Question 13

Precipitation reaction

Answer 13

Take 2 transparent solutions. Mix the 2. Until a mark on paper is no longer visible time it.

Question 14

Reaction rate in change of mass

Answer 14

Using a mass balance. Time when the mass stops changing.

Question 15

Reaction rate from gas release

Answer 15

Collect gas over a given time interval. The reaction ends once it stops changing