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Atomic Physics – 1 – 2

6. Nucleus is :

(a) positively charged
(b) negatively charged
(c) neutral
(d) charge keeps on changing

ANSWER

EXPLANATION

7. Electron in atom are held in atom due to :

(a) atomic force
(b) nuclear force
(c) coulombs force
(d) none fo these

ANSWER

EXPLANATION

8. An electron can Never be found inside nucleus’, this statement is according to :

(a) Bohr’s model
(b) Bernoulli’s equation
(c) Heisenberg uncertainty principle
(d) None of these

ANSWER

EXPLANATION

9. The ionization energy of hydrogen atom is 13.6 eV. The ionization energy of helium atom would be :

(a) 13.6 eV 
(b) 27.2 eV 
(c) 54.4 eV
(d) 62.8 eV 

ANSWER

EXPLANATION

10. In Bohr model the hydogen atom, the lowest orbil corresponds to :

(a) Intinite energy
(b) Zero energy
(c) The minimum energy
(d) The maximum energy

ANSWER

EXPLANATION

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