Nucleus: Common Terms

Q.

A technique called mass spectrometry is used to segregate different isotopes of an element. In such a setup, hydrogen gas is sent which is ionized by the ion source and we get nuclei of protium ${(}_1^{1}H)$, deuterium ${(}_1^{2}H)$ and tritium ${(}_1^{3}H)$.

A perpendicular magnetic field is used to deviate these in separate beams. Pick the correct option.

1. a - protium; b - deuterium; c - tritium

2. a - protium; b - tritium; c - deuterium

3. a - tritium; b - deuterium; c - protium

4. a - deuterium; b - protium; c - tritium

Q.

Nuclei with same number of protons but different number of neutrons are called ___.

Nuclei with same number of neutrons but different atomic number are called ___.

Nuclei with same mass number are called ___.

Q. The $\alpha$ -particle is the nucleus of --------- atom .

1. Neon
2. Hydrogen
3. Helium
4. Deuterium

Q.

Which of the given relations about the above elements are correct.
I) ${}^{12}C$
II) ${}^{14}C$
III) ${}^{14}N$
IV) ${}^{16}O$

1. I and II are isotopes

2. II and III are isobars

3. II and IV are isotones

4. III and IV are isobars

Q.

The mass of a neutral carbon atom, a specimen of the most common isotope, in ground state is

1. equal to 12 u

2. less than 12 u

3. more than 12 u

4. Depends on the allotrope, whether it is graphite, charcoal or diamond.

Q.

The value of A for a neutral atom is 25 and Z is 12; find the number of protons, neutrons and electrons in the atom.

1. 12, 25 and 12 respectively

2. 25, 12 and 25 respectively.

3. 12, 13 and 12 respectively

4. 12, 25 and 25 respectively

Q. Atomic number of a nucleus is Z and atomic mass is M. The number of neutron is

1. M-Z
2. M+Z
3. M
4. Z

Q.

The future you synthesizes a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?

1. 

2. 

3. 

4. 

Q. If Avogadro's number is $6\times {10}^{23}$ then the number of protons, neutrons and electrons in 14 g of ${}_6{C}^{14}$ are respectively

1. $36\times {10}^{23},48\times {10}^{23},36\times {10}^{23}$
   
2. $48\times {10}^{23},36\times {10}^{23},48\times {10}^{21}$
   
3. $36\times {10}^{23},36\times {10}^{23},36\times {10}^{21}$
   
4. $48\times {10}^{23},48\times {10}^{23},36\times {10}^{21}$

Q.

The chemical behaviour of an atom depends upon

1. the number of protons in its nucleus

2. the number of neutrons in its nucleus

3. the number of electrons orbiting around its nucleus

4. the number of nucleons in its nucleus.