3.1.2 Group 2

Question 1

what kind of properties do group 2 elements have

Answer 1

alkaline

Question 2

what are the 3 general properties of group 2 elements

Answer 2

metals have high melting and boiling points
metals have hydroxides that are alkaline
elements form colourless solutions or white compounds

Question 3

what do group 2 elements form when they lose 2 electrons

Answer 3

dispositive ions

Question 4

what kind of agents are group 2 elements

Answer 4

reducing agents

Question 5

what happens to first and second ionisation energies as we go down group 2

Answer 5

they decrease

Question 6

reactivity down group 2

Answer 6

more electrons shells - outer electron is further from the nucleus.
shielding is increased.
nuclear charges increases - this factor is outweighed.
nuclear attraction for outer electron decreased.
easier to remove and electron.

Question 7

what 3 types of reactions can take place with group 2

Answer 7

with oxygen
with water
with dilute acid

Question 8

what are the observations of group 2 elements with water

Answer 8

solid dissolves/ fizzing

Question 9

what is different with the reaction of magnesium with water

Answer 9

the reaction is very slow. It reacts more vigorously with steam. (the Mg(OH)2 produced thermally decomposes to form MgO.

Question 10

what do group 2 hydroxides form when dissociated in water

Answer 10

a metal cation and an hydroxide OH- ion

Question 11

what are the observations of group 2 elements with dilute acid

Answer 11

solid dissolves/ fizzing