Who discovered canal rays and in which year?
Sub-Atomic Particles – Protons and Neutrons

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Biology, Mathematics, Chemistry, Science, Physics
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1st - 12th Grade
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
J.J. Thomson in 1897
Eugen Goldstein in 1886
James Chadwick in 1932
Ernest Rutherford in 1911
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary characteristic of anode rays?
They do not produce fluorescence.
They are positively charged particles.
They travel in the same direction as cathode rays.
They are negatively charged particles.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did Rutherford discover about the atomic nucleus?
It contains both protons and neutrons.
It contains only neutrons.
It contains only protons.
It contains only electrons.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What was the mass discrepancy observed in helium atoms?
Helium's mass is four times that of hydrogen.
Helium's mass is equal to hydrogen's mass.
Helium's mass is half that of hydrogen.
Helium's mass is twice that of hydrogen.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What experiment did Chadwick perform to discover neutrons?
He used a cathode ray tube.
He bombarded beryllium with alpha particles.
He used a gold foil experiment.
He observed the deflection of anode rays.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a unique property of neutrons compared to protons and electrons?
They are negatively charged.
They are positively charged.
They are lighter than electrons.
They have no charge.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to a free neutron over time?
It transforms into a photon.
It becomes a positively charged particle.
It decays into a proton, electron, and neutrino.
It remains stable indefinitely.
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