Element G reacts with chlorine to form a chloride. This reacts with water to form an acidic solution.
Which group in the Periodic Table is G in?
Group 1
Group 2
Group 5
Group 6
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Syllabus Edition
First teaching 2023
First exams 2025
Element G reacts with chlorine to form a chloride. This reacts with water to form an acidic solution.
Which group in the Periodic Table is G in?
Group 1
Group 2
Group 5
Group 6
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Element Z reacts with oxygen to form an oxide that is a solid at room temperature and pressure. The oxide formed can react with both acids and bases.
What could be the identity of Z?
Si
Mg
Cl
Al
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Element X forms an oxide with a high melting point of 1710 °C. The oxide reacts with NaOH (aq).
What is the identity of X?
Si
Na
Cl
S
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The period 4 elements gallium (Ga), germanium (Ge), arsenic (As) and selenium (Se) are the elements directly below aluminium, silicon, phosphorus and sulfur in the Periodic Table.
The properties of each period 4 element resemble those of the period 3 element directly above it.
Which period 4 elements form oxides that dissolve in water to give an acid solution?
Ga and Ge
Ga and Se
As and Se
Se only
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Elements X and Y react together to form compound Z. Elements X and Y are both in Period 3. Element X has the second smallest atomic radius in Period 3. Apart from argon, there is only one element in Period 3 which has a lower melting point than element Y.
Which compound could be Z?
Na2S
MgS
MgCl2
PCl3
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Compound X readily conducts electricity when added to water to produce a solution but does not conduct electricity in its liquid state.
Which of the following could X be?
1 |
MgCl2 |
2 |
PCl3 |
3 |
SiCl4 |
1, 2 and 3
1 and 2
2 and 3
1 only
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The successive ionisation energies of elements X and Y are shown below.
Element X |
||||||||
IE |
1st |
2nd |
3rd |
4th |
5th |
6th |
7th |
8th |
IE (kJ mol-1) |
590 |
1145 |
4912 |
6491 |
8153 |
10496 |
12270 |
14206 |
Element Y |
||||||||
IE |
1st |
2nd |
3rd |
4th |
5th |
6th |
7th |
8th |
IE (kJ mol-1) |
1012 |
1907 |
2914 |
4964 |
6274 |
21267 |
25431 |
29872 |
X and Y form ions with the same electron configuration as argon.
What are the identities of elements X and Y respectively?
Calcium and phosphorus
Sodium and oxygen
Magnesium and nitrogen
Phosphorus and potassium
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G and J are oxides of different Period 3 elements.
If one mole of J is added to water, the solution formed is neutralised by exactly one mole of G.
What could be the identities of G and J?
G | J | |
A | Na2O | SO3 |
B | Na2O | P4O10 |
C | Al2O3 | SO3 |
D | Al2O3 | P4O10 |
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An element Z has the same oxidation state as a common iron ion but the Z ion has the same number of electrons as Ne . An oxide of element Z reacts with a strong acid to produce a chloride salt but does not dissolve in water.
What is the correct identity of element Z?
Magnesium
Silicon
Sodium
Aluminium
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