Redox reactions and reactivity of Group 2 metals

Question 1

What is the name for the group 2 metals in the periodic table

Answer 1

Alkaline earth metals

Question 2

Which subshell are group 2 metals found in?

Answer 2

S² subshell

Question 3

Are group 2 metals reducing agents or oxidising agents?

Answer 3

Reducing agents

because they LOSE electrons and are oxidised, their electrons are transferred to the other species which is reduced as it GAINS the electrons

Question 4

Write the half equation of the reduction of a group 2 metal (give the metal as X)

Answer 4

X → X²⁺ + 2e^-

with oxidation, it is LOSING electrons, so it begins as an element on its own on the left and then on the right the electrons are like EXPELLED from it to show they ahve been REMOVED from the elment to form the 2+ ion!!!

Question 5

What happens to the reactivity of group 2 metals going down the group?

Answer 5

It increases

Question 6

What happens to the first and second ionisation energy of group 2 metals going down the group?

Answer 6

It decreases

Question 7

Explain the trend in reactivity of group 2 metals in terms of first and second ionisation energy

Answer 7

1. As you go down group 2, the first and second ionisation energies decrease
2. This is because the atomic radius increases going down the group
3. The number of inner electrons shells increases which increases the electron shielding
4. These decrease the nuclear force of attraction between the positively charged nucleus and the outershell electrons
5. This means the first and second ionisation energies decrease going down the group and less energy is required to remove the outer shell electrons, so the reactivity INCREASES going down the group.

MAKE SURE THAT YOU CLARIFY THAT 1) THE IONISATION ENERGIES DECREASE GOING DOWN ANDDD 2) THAT THE REACTIVITY INCREASES GOING DOWN, BC THIS LAST PART IS WHAT THE QUESTION IS ACTUALLY ABOUT

Question 8

What is the general word equation for the reaction of a metal + oxygen?

Answer 8

Metal + Oxygen → Metal Oxide

Question 9

What is the general word equation for the reaction between metal + water?

Answer 9

Metal + Water → Metal hydroxide + Hydrogen

Question 10

What type of reaction is the reaction between metals and oxygen?

Answer 10

REDOX reaction

Question 11

What type of reaction of the reaction between metals and water?

Answer 11

REDOX reaction

Question 12

What is the general word equation for the reaction of metal + acid?

Answer 12

Metal + Acid → Salt + Hydrogen

Question 13

What type of reaction is the reaction between a metal and an acid?

Answer 13

REDOX Reaction