Atoms & Isotopes (OCR GCSE Physics A, Combined (Gateway Science Suite)): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What particles are found in the nucleus of an atom?
What particles are found in the nucleus of an atom?
Protons and neutrons
What is the relative charge of a proton?
What is the relative charge of a proton?
+1
What is the relative mass of an electron?
What is the relative mass of an electron?
0 (0.0005)
What is the typical radius of an atom?
What is the typical radius of an atom?
metres
How much smaller is the nucleus radius compared to the atom?
How much smaller is the nucleus radius compared to the atom?
10,000 times smaller
Where is most of the mass of an atom concentrated?
Where is most of the mass of an atom concentrated?
In the nucleus
What was Thomson's plum pudding model?
What was Thomson's plum pudding model?
Ball of positive charge with negative electrons in it
In Rutherford's experiment, what did most alpha particles going straight through show?
In Rutherford's experiment, what did most alpha particles going straight through show?
The atom is mostly empty space
What did alpha particles bouncing back in Rutherford's experiment show?
What did alpha particles bouncing back in Rutherford's experiment show?
Mass is concentrated in the centre
What are the orbits of electrons called in Bohr's model?
What are the orbits of electrons called in Bohr's model?
Energy levels or shells
Which scientist proved the existence of the neutron?
Which scientist proved the existence of the neutron?
James Chadwick
What happens when an atom absorbs EM radiation?
What happens when an atom absorbs EM radiation?
Electron moves to higher energy level