Subatomic Particles Discovery Quiz

12 Questions

Which subatomic particle was discovered by James Chadwick in 1932?

Neutrons

What is the charge of an electron?

Negative charge

Who proposed the atomic theory that atoms are indivisible and neutral particles known as neutrons?

John Dalton

What type of particles make up cathode rays?

Negatively charged particles

Which scientist observed streams of heavy particles emitted from the anode, known as canal rays?

James Chadwick

What is the approximate mass of a neutron?

$1.6 * 10^-27$ kg

Which subatomic particle is approximately 2000 times heavier than an electron?

Proton

In what year were electrons first identified by J.J. Thomson?

1897

Match the scientist with their contribution to the understanding of atomic structure:

Dalton = Proposed the atomic theory that atoms are indivisible and neutral particles known as neutrons Thomson = Discovered cathode rays consisting of small negatively charged particles called electrons Goldstein = Observed streams of heavy particles emitted from the anode, known as canal rays, consisting of positively charged particles ultimately identified as protons Chadwick = Discovered neutrons as neutral particles with no charge and a mass of 1.6 * 10^-27 kg

Match the subatomic particle with its characteristic:

Electron = Mass of 9 * 10^-31 kg and a negative charge of 1.6 * 10^-19 C Proton = Positive charge of 1.6 * 10^-19 C and approximately 2000 times heavier than electrons Neutron = Neutral particle with no charge and a mass of 1.6 * 10^-27 kg Canal Rays = Stream of heavy particles emitted from the anode, consisting of positively charged particles

Match the year with the corresponding scientific discovery:

1897 = Existence of negatively charged particles identified as electrons by J.J.Thomson 1932 = Discovery of neutrons as neutral particles by James Chadwick

= Thomson's observation of cathode rays consisting of electrons

Match the property with the correct subatomic particle:

Heaviest subatomic particle = Proton No charge but significant mass = Neutron Smallest mass but negatively charged = Electron Carries a positive charge and heavy compared to others = Proton

Study Notes

Dalton's atomic theory revolutionized the understanding of matter by suggesting that atoms are indivisible and neutral particles known as neutrons.
Cathode rays experiment by J.J. Thomson in 18971 showed the existence of negatively charged particles, later identified as electrons.
Thomson's experiment with a discharge tube and high voltage led to the discovery of cathode rays consisting of small negatively charged particles called electrons.
Goldstein's experiment, similar to Thomson's, observed streams of heavy particles emitted from the anode, known as canal rays, consisting of positively charged particles ultimately identified as protons.
Neutrons were discovered by James Chadwick in 1932, revealing them as neutral particles with no charge and a mass of 1.6 * 10^-27 kg.
Electrons have a mass of 9 * 10^-31 kg and a negative charge of 1.6 * 10^-19 C, while protons have a positive charge of the same magnitude.
Protons are approximately 2000 times heavier than electrons and carry a positive charge of 1.6 * 10^-19 C.
Neutrons, being neutral particles, have no charge and a mass of 1.6 * 10^-27 kg.
The discovery of these subatomic particles (electrons, protons, neutrons) transformed the understanding of atomic structure and composition.
These experiments laid the foundation for modern chemistry and physics, providing crucial insights into the composition and behavior of atoms.

Test your knowledge of the groundbreaking experiments that led to the discovery of subatomic particles such as electrons, protons, and neutrons. Explore the contributions of scientists like J.J. Thomson, Ernest Rutherford, and James Chadwick to our understanding of atomic structure.

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