Question

write the names of the scientist who made the following :-

(Eugen Goldstein, Henry becquerel, John Dalton, Joseph thomson, James chadwick, Ernest Rutherford)

1) in 1803,______ started that matter is composed of atoms of different weights.
2) _______ discovered protons in 1886.
3) _______ discovered electrons in 1897.
4) _______ discovered radioactivity and received the Nobel prize in 1903.
5) ________ discovered the nucleus of atom in 1911.
6) _______ discovered neutrons in 1935.

QUICK QUIZ :-
1) every year, about _____ of the atoms in our body are replaced.
i. 86% ii. 98% iii. 22% iv. 100%​

Answer 1

Answer:

1) in 1803 John Dalton started that matter is composed of atoms of different weights.

2) Eugen Goldstein discovered protons in 1886.

3) Joseph thomson discovered electrons in 1897.

4) Henry becquerel discovered radioactivity and received the Nobel prize in 1903.

5) Ernest Rutherford discovered the nucleus of atom in 1911.

6) James chadwick discovered neutrons in 1935.

QUICK QUIZ :-

1) every year, about 98% of the atoms in our body are replaced.

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