Atoms (Leaving Cert Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
About how many atoms would fit across one full stop on a page?
About how many atoms would fit across one full stop on a page?
2 million
How many different kinds of atoms are known today?
How many different kinds of atoms are known today?
118
In which year did J.J. Thomson discover electrons?
In which year did J.J. Thomson discover electrons?
1897
What was Thomson's atomic model commonly called?
What was Thomson's atomic model commonly called?
Plum pudding model
In Thomson's model, how was the positive charge distributed?
In Thomson's model, how was the positive charge distributed?
Spread evenly throughout the atom
What did Rutherford propose was at the centre of the atom?
What did Rutherford propose was at the centre of the atom?
A tiny, dense nucleus
What charge do alpha particles carry?
What charge do alpha particles carry?
Positive
How thick was the gold foil in Rutherford's experiment?
How thick was the gold foil in Rutherford's experiment?
About 2000 atoms
What happened to most alpha particles in the gold foil experiment?
What happened to most alpha particles in the gold foil experiment?
Passed straight through undeflected
What key fact did Rutherford's experiment prove about atoms?
What key fact did Rutherford's experiment prove about atoms?
The atom is mostly empty space
What is the approximate radius of the nucleus?
What is the approximate radius of the nucleus?
metres
How many times smaller is the nucleus than the entire atom?
How many times smaller is the nucleus than the entire atom?
About 100,000 times