Consider the following statements: A. Atoms of each element emit characteristics spectrum. B. According to Bohr's Postulate, an electron in a hydrogen atom, revolves in a certain stationary orbit. C. The density of nuclear matter depends on the size of the nucleus. D. A free neutron is stable but a free proton decay is possible. E. Radioactivity is an indication of the instability of nuclei. Choose the correct answer from the options given below:

Question

Consider the following statements: A. Atoms of each element emit characteristics spectrum. B. According to Bohr's Postulate, an electron in a hydrogen atom, revolves in a certain stationary orbit. C. The density of nuclear matter depends on the size of the nucleus. D. A free neutron is stable but a free proton decay is possible. E. Radioactivity is an indication of the instability of nuclei. Choose the correct answer from the options given below: (A) A, B, C, D and E (B) A, B and E only (C) B and D only (D) A, C and E only

Tardigrade Admin · Accepted Answer

(A) True, atom of each element emits characteristic spectrum.
(B) True, according to Bohr's postulates

m v r = \frac{nh}{2 π}

and hence electron resides into orbits of specific radius called stationary orbits.
(C) False, density of nucleus is constant
(D) False,

A

free neutron is unstable decays into proton and electron and antineutrino.
(E) True unstable nucleus show radioactivity.

$A, B, C, D$ and $E$

$A, B$ and $E$ only

$B$ and $D$ only

$A, C$ and $E$ only

A,B,C,D and E

A,B and E only

B and D only

A,C and E only

$A, B, C, D$ and $E$

$A, B$ and $E$ only

$B$ and $D$ only

$A, C$ and $E$ only