Trends of Period 3 Elements: Atomic Radius (AQA A-Level Chemistry): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is atomic radius?
What is atomic radius?
Distance from nucleus to outermost shell
How does atomic radius change across Period 3 from to ?
How does atomic radius change across Period 3 from to ?
Decreases steadily
Which two elements mark the start and end of Period 3?
Which two elements mark the start and end of Period 3?
Sodium and argon
What happens to the number of protons across Period 3 from left to right?
What happens to the number of protons across Period 3 from left to right?
Increases
What happens to nuclear charge across Period 3?
What happens to nuclear charge across Period 3?
It increases
What type of attraction pulls electrons closer to the nucleus?
What type of attraction pulls electrons closer to the nucleus?
Electrostatic attraction
What happens to the number of electron shells across Period 3?
What happens to the number of electron shells across Period 3?
Stays the same
What happens to shielding across Period 3?
What happens to shielding across Period 3?
No increase in shielding
Why are outer electrons pulled closer to the nucleus across Period 3?
Why are outer electrons pulled closer to the nucleus across Period 3?
Increasing nuclear charge, same shielding
Which energy level do electrons occupy in Period 3 elements?
Which energy level do electrons occupy in Period 3 elements?
Third shell