Nucleus Common Terms

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___ respectively.

1. Isotopes, isotones, isobars
2. Isotones, isotopes, isobars
3. Isobars, isotopes, isotones
4. Isochores, isotones, isobars

Q.

An ion ${\mathrm{M}}^{+2}$ contains 10 electrons. What is the atomic number of M?

Q. The most abundant elements by mass in the body of a healthy human adult are : Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all $H^1$ atoms are replaced by $H^2$ is :

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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 below elements are correct.

$a{)}^{12}Cb{)}^{14}Cc{)}^{14}Nd{)}^{16}O$

1. a and b are isotopes
2. b and c are isobars
3. b and d are isotones
4. c and d are isobars

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

1. more than 12 u
2. Depends on the allotrope, whether it is graphite, charcoal or diamond.
3. equal to 12 u
4. less than 12 u

Q. Nucleons are

1. Protons and electrons
2. Protons and neutrons
3. Electrons and neutrons
4. Electrons, protons and neutrons

Q. In the future you synthesize 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. ${}_4^{2}X$
2. ${}_4^{6}X$
3. ${}_4^{4}X$
4. ${}_2^{4}X$

Q. The most abundant elements by mass in the body of a healthy human adult are: Oxygen $\left(61.4\%\right)$, Carbon $\left(22.9\%\right)$, Hydrogen $\left(10.0\%\right)$ and Nitrogen $\left(2.6\%\right)$. The weight which a 75 kg person would gain if all $H^1$ atoms are replaced by $H^2$ atoms is:

1. 37.5 $kg$
2. 7.5 $kg$
3. 10 $kg$
4. 15 $kg$

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.