Trends of Period 3 Elements: First Ionisation Energy (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What does first ionisation energy measure?
What does first ionisation energy measure?
Energy to remove 1 mole of from 1 mole of gaseous atoms
What is the general trend in first ionisation energy across Period 3 from Na to Ar?
What is the general trend in first ionisation energy across Period 3 from Na to Ar?
It increases
Why does nuclear charge increase across Period 3?
Why does nuclear charge increase across Period 3?
Number of protons increases
Why is there no significant increase in shielding across Period 3?
Why is there no significant increase in shielding across Period 3?
Electrons added to same energy level
What happens to atomic radius across Period 3?
What happens to atomic radius across Period 3?
It decreases
Why is aluminium's first ionisation energy lower than expected?
Why is aluminium's first ionisation energy lower than expected?
Outer in p sub-shell, more shielded
In which sub-shell is the outer electron for Group 2 elements in Period 3?
In which sub-shell is the outer electron for Group 2 elements in Period 3?
s sub-shell
Why is sulfur's first ionisation energy lower than expected?
Why is sulfur's first ionisation energy lower than expected?
Electron repulsion in same p orbital
What is the electron configuration notation for Group 6 elements mentioned in the trend exception?
What is the electron configuration notation for Group 6 elements mentioned in the trend exception?
p4
Which two main factors cause the general increase in first ionisation energy across Period 3?
Which two main factors cause the general increase in first ionisation energy across Period 3?
Increasing nuclear charge & decreasing radius