Families and Trends in the Periodic Table (LC 2027) (Leaving Cert Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the covalent radius of an atom?
What is the covalent radius of an atom?
Half distance between 2 bonded nuclei
In , the nuclei are 0.074 nm apart. What is hydrogen's covalent radius?
In , the nuclei are 0.074 nm apart. What is hydrogen's covalent radius?
0.037 nm
What happens to atomic radius across a period from left to right?
What happens to atomic radius across a period from left to right?
Decreases
Why does atomic radius decrease across a period?
Why does atomic radius decrease across a period?
Increasing nuclear charge pulls closer
How many energy levels do elements in the same period have?
How many energy levels do elements in the same period have?
Same number of energy levels
What happens to atomic radius down a group from top to bottom?
What happens to atomic radius down a group from top to bottom?
Increases
Why does atomic radius increase down a group?
Why does atomic radius increase down a group?
One more electron shell added each time
What is the screening effect?
What is the screening effect?
Inner shells shield outer electrons from nucleus
What happens to screening effect moving down a group?
What happens to screening effect moving down a group?
Becomes progressively stronger
Which factor makes atomic radius smaller?
Which factor makes atomic radius smaller?
More protons in nucleus
Why don't noble gases have covalent radii values?
Why don't noble gases have covalent radii values?
Rarely form covalent bonds
Which factor increases atomic radius?
Which factor increases atomic radius?
More energy levels