Atoms and Nuclei (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics): Questions 7 - 10 of 15

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Question number: 7

» Atoms and Nuclei » Isotopes

Appeared in Year: 2014

MCQ▾

Question

Consider the following statements. The correct statement regarding an isotope is,

(i) All isotopes of an element have the same number of neutrons

(ii) Only one isotope of an element can be stable and non-radioactive

(iii) All elements have isotopes

(iv) All isotopes of Carbon can form chemical compounds with Oxygen-16

Select any one of following,

Choices

Choice (4) Response

a.

(ii) and (iv) are correct

b.

(i), (ii) and (iii) are correct

c.

(iii) and (iv) are correct

d.

(i) and (iii) are correct

Question number: 8

» Atoms and Nuclei » Alpha-Particle Scattering Experiment

Appeared in Year: 2014

MCQ▾

Question

In 1911, the physicist Ernest Rutherford discovered that atoms have a tiny, dense nucleus by shooting positively charged particles at a very thin gold foil. A key physical property, which lead Rutherford to use gold that it was.

Choices

Choice (4) Response

a.

Electrically conducting

b.

Shiny

c.

reactive

d.

Highly malleable

Question number: 9

» Atoms and Nuclei » Radioactivity

Appeared in Year: 2015

MCQ▾

Question

The beta particles of a radioactive metal originate from

Choices

Choice (4) Response

a.

The free electrons in the metal

b.

The orbiting electrons of the metal atoms

c.

The photons released from the nucleus

d.

The nucleus of the metal atoms

Question number: 10

» Atoms and Nuclei » Composition and Size of Nucleus

MCQ▾

Question

A nucleus of bismuth emits three electrons followed by two alpha particles. The resulting nucleus will have –

Choices

Choice (4) Response

a.

78 protons and 134 neutrons

b.

82 protons and 92 neutrons

c.

82 protons and 128 neutrons

d.

80 protons and 119 neutrons

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