Nucleus: Common Terms

Q.

Find out the number of electrons, protons, and neutrons present in sodium and chloride ions.

Q.

An ion $X^{2+}$ contains 18 electrons and 20 neutrons. Calculate the atomic number and mass no. of element X. Name the element X.

1. Atomic no -18, Mass no - 40, Argon

2. Atomic no - 22, Mass no - 48, Titanium

3. None of the above

4. Atomic no - 20, Mass no - 40, Calcium

Q.

Two protons exert a nuclear force on each other, then what is the distance between them?

1. ${10}^{-14}m$

2. ${10}^{-10}m$

3. ${10}^{-12}m$

4. ${10}^{-8}m$

Q.

Nuclei with the same number of protons but a different number of neutrons are called isobars

Nuclei with the same number of neutrons but a different atomic number are called isotopes

Nuclei with the same mass number are called isotones

1. Isotopes

2. Isotones

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.

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.

$M_n$ and $M_p$ represent mass of neutron and proton respectively. If an element having nuclear mass M has N-neutron and Z-proton, then the correct relation will be

1. $M>[N{M}_n+Z{M}_p]$

2. $M=[N{M}_n+Z{M}_p]$

3. $M=N[M_n+M_p]$

4. $M<[N{M}_n+Z{M}_p]$

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. Following are the atoms having the number of neutrons and protons as given below:

1. A, B and C, D are isotopes
2. A and D are isotones
3. A and E are isobars
4. A and B are not isodiaphers

Q.

An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. The ion is ?

Q.

The ion of an element has 3 positive charges. The mass number of the atom is 27 and the number of neutrons is 14. Then what is the number of electrons in the ion?

1. 13

2. 10

3. 14

4. 16