In atom, neutron was discovered by:a)J.J. Thomsonb)Chadwickc)Rutherfordd)NewtonCorrect answer is option 'B'. Can you explain this answer?

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In atom, neutron was discovered by:

a)
J.J. Thomson
b)
Chadwick
c)
Rutherford
d)
Newton

Correct answer is option 'B'. Can you explain this answer?

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In atom, neutron was discovered by:a)J.J. Thomsonb)Chadwickc)Rutherfor...

Neutron is a neutral particle which has no electrical charge. It was discovered by Chadwick in 1932.

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Read the passages carefully and choose the best answer to each question out of the four alternatives.The quest to find life outside the solar system got a big boost with the discovery of seven Earth-size extra-solar planets, or exoplanets, orbiting a dwarf star about 40 light years away. Unlike earlier discoveries of exoplanets, all seven planets could possibly have liquid water — a key to life as we know it on Earth — with three planets having the greatest chance. This is by far the largest collection of Earth-like planets in the habitable Goldilocks zone of a star — neither too close nor too far from a star, which raises the possibility of liquid water being present on the surface. Only Earth has liquid water in the solar system. Since the dwarf star is much cooler than the Sun, the dimming of light each time a planet passes or transits before the star could be easily recorded from Earth unlike in cases when planets transit a Sun-like bright star. Since the initial discovery of three planets was made using the Chile-based Transiting Planets and Planetesimals Small Telescope, the exoplanet system is called TRAPPIST-1.Q. The telescope TRAPPIST is in which country?

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Read the passages carefully and choose the best answer to each question out of the four alternatives.The quest to find life outside the solar system got a big boost with the discovery of seven Earth-size extra-solar planets, or exoplanets, orbiting a dwarf star about 40 light years away. Unlike earlier discoveries of exoplanets, all seven planets could possibly have liquid water — a key to life as we know it on Earth — with three planets having the greatest chance. This is by far the largest collection of Earth-like planets in the habitable Goldilocks zone of a star — neither too close nor too far from a star, which raises the possibility of liquid water being present on the surface. Only Earth has liquid water in the solar system. Since the dwarf star is much cooler than the Sun, the dimming of light each time a planet passes or transits before the star could be easily recorded from Earth unlike in cases when planets transit a Sun-like bright star. Since the initial discovery of three planets was made using the Chile-based Transiting Planets and Planetesimals Small Telescope, the exoplanet system is called TRAPPIST-1.Q. How many planets in our solar system have liquid water?