MEDIUM
AS and A Level
IMPORTANT
Earn 100
The first ionisation energies of the p-block elements are given in the table below. Predict the missing value for the first ionisation energy of selenium.
p-block element of period 4
Atomic number
First ionisation energy/
gallium
31
577
germanium
32
762
arsenic
33
966
selenium
34
bromine
35
1140
krypton
36
1350
Important Questions on Periodicity
MEDIUM
AS and A Level
IMPORTANT
Which one of these statements about the periodicity of the Period 3 elements is correct?
MEDIUM
AS and A Level
IMPORTANT
The Group 1 metal lithium reacts in a similar way to sodium. It reacts with oxygen, producing lithium oxide. Write the balanced symbol equation, including state symbols, for this reaction.
MEDIUM
AS and A Level
IMPORTANT
Lithium also reacts with chlorine. Write the balanced symbol equation, including state symbols, for this reaction.
MEDIUM
AS and A Level
IMPORTANT
The Group 2 metal calcium reacts more vigorously with cold water than magnesium does, forming an alkaline solution. Write the balanced symbol equation, including state symbols, for this reaction.
MEDIUM
AS and A Level
IMPORTANT
The solution formed when of calcium react completely with of water is more alkaline than the solution formed when of magnesium react completely with of water. Explain why?
MEDIUM
AS and A Level
IMPORTANT
The element germanium is in Group 14, in Period 4. It is classed as a semimetal or metalloid, as is silicon in Period 3.
Predict the chemical bonding and structure of the element germanium.
MEDIUM
AS and A Level
IMPORTANT
The element germanium is in Group 14, in Period 4. It is classed as a semimetal or metalloid, as is silicon in Period 3.
Germanium(IV) oxide has properties similar to silicon dioxide. It is an acidic oxide. Write a balanced symbol equation, including state symbols, to show the reaction of germanium(IV) oxide with hot, concentrated sodium hydroxide solution.
MEDIUM
AS and A Level
IMPORTANT
The element germanium is in Group 14, in Period 4. It is classed as a semimetal or metalloid, as is silicon in Period 3.
What would you expect to happen if germanium(IV) oxide was added to hydrochloric acid?
