aqa a level chemistry
periodicity and group 3
elements exam QUESTIONS
AND VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
The graph shows the successive ionisation energies of a Period 3 element, X.
Identify element X. Explain your choice. - CORRECT ANSWER-M1 Phosphorus
M2 large jump in ionisation energy for the 6th ionisation energy
M3 This is when the electron is being removed from the 2nd energy level
Which represents the correct order of increasing radius of the ions?
A F- O2- Li+ Be2+
B Li+ Be2+ O2- F-
C Be2+ Li+ F- O2-
D O2- F- Li+ Be2+ - CORRECT ANSWER-C
Identify the element in Period 3, from sodium to argon, that has the highest second ionisation
energy.
Give an equation, including state symbols, to show the process that occurs when the second
ionisation energy of this element is measured. - CORRECT ANSWER-M1 Na 1
M2 Na+ (g) → Na2+(g) + e-
, Explain why the atomic radius decreases across Period 3, from sodium to chlorine. - CORRECT
ANSWER-The number of protons increases
Therefore, the attraction between the nucleus and electrons increases
also Shielding is similar
Phosphorus burns in air to form phosphorus(V) oxide. Give an equation for this reaction. -
CORRECT ANSWER-4P + 5O2 → P4O10 OR P4 + 5O2 → P4O10
State the meaning of the term periodicity - CORRECT ANSWER-Repeating pattern and trends (of
physical and chemical properties
Identify the element in Period 4 with the highest electronegativity value. - CORRECT ANSWER-
Bromine
Identify the element in Period 4 with the largest atomic radius
Explain your answer - CORRECT ANSWER-Potassium
The smallest number of protons and smallest nuclear charge
Also Similar shielding
Name the property of arsenic(III) oxide that describes its ability to react in these two ways. -
CORRECT ANSWER-Amphoteric
Which element has the highest first ionisation energy?
A Aluminium
B Phosphorus
C Silicon
D Sulfur - CORRECT ANSWER-B
periodicity and group 3
elements exam QUESTIONS
AND VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
The graph shows the successive ionisation energies of a Period 3 element, X.
Identify element X. Explain your choice. - CORRECT ANSWER-M1 Phosphorus
M2 large jump in ionisation energy for the 6th ionisation energy
M3 This is when the electron is being removed from the 2nd energy level
Which represents the correct order of increasing radius of the ions?
A F- O2- Li+ Be2+
B Li+ Be2+ O2- F-
C Be2+ Li+ F- O2-
D O2- F- Li+ Be2+ - CORRECT ANSWER-C
Identify the element in Period 3, from sodium to argon, that has the highest second ionisation
energy.
Give an equation, including state symbols, to show the process that occurs when the second
ionisation energy of this element is measured. - CORRECT ANSWER-M1 Na 1
M2 Na+ (g) → Na2+(g) + e-
, Explain why the atomic radius decreases across Period 3, from sodium to chlorine. - CORRECT
ANSWER-The number of protons increases
Therefore, the attraction between the nucleus and electrons increases
also Shielding is similar
Phosphorus burns in air to form phosphorus(V) oxide. Give an equation for this reaction. -
CORRECT ANSWER-4P + 5O2 → P4O10 OR P4 + 5O2 → P4O10
State the meaning of the term periodicity - CORRECT ANSWER-Repeating pattern and trends (of
physical and chemical properties
Identify the element in Period 4 with the highest electronegativity value. - CORRECT ANSWER-
Bromine
Identify the element in Period 4 with the largest atomic radius
Explain your answer - CORRECT ANSWER-Potassium
The smallest number of protons and smallest nuclear charge
Also Similar shielding
Name the property of arsenic(III) oxide that describes its ability to react in these two ways. -
CORRECT ANSWER-Amphoteric
Which element has the highest first ionisation energy?
A Aluminium
B Phosphorus
C Silicon
D Sulfur - CORRECT ANSWER-B
