Module 2 - Reactivity Trends

Question 1

What are the Group 2 elements in the periodic table?

Answer 1

Alkaline earth metals - alkaline due to properties of metal hydroxides

Question 2

Describe the Group 2 physical properties

Answer 2

Alkaline earth metals - Alkaline metal hydroxides
Reactive metals
Do not occur in elemental form naturally - found in stable compounds

Question 3

What type of reactions are most common with Group 2 elements

Answer 3

Redox reactions

Question 4

Describe redox reactions with Group 2 elements

Answer 4

Group 2 element 2 outer shell electrons in outer s-sub shell

Metal atom oxidised - loses 2 electrons to form 2+ ion with stable electron configuration of noble gas

Another species gains 2 electrons and becomes reduced
Group 2 elements are REDUCING AGENTS - reduce another species

Question 5

What do Group 2 elements react with oxygen to form

Answer 5

Metal oxides

Question 6

Describe observations of magnesium reaction with oxygen

Answer 6

Magnesium Burns with brilliant white light

Forms magnesium oxide

Question 7

What do Group 2 elements react with water to form?

Answer 7

Alkaline hydroxide

M(OH)2

Question 8

Describe water reaction with magnesium compared to other elements down Group (2 points)

Answer 8

Slow reaction

Reaction more vigorous with metals further down Group as reactivity increases

Question 9

Redox reaction with dilute acid forms ?

Answer 9

Metsalt + hydrogen