Question

Which are the isotope, isotone and isobar nuclei respectively of 6^12C from among 6^14 C, 5^12 B, 7^13 N?choose the correct option from the given options.
(A) 6^14 C, 7^13 N, 5^12 B
(B) 5^12 B,6^14 C,7^13 N
(C) 7^13 N,5^12 B,6^14 C
(D) 6^14 C,5^12 B,7^13 N

Answer 1

Number of protons in an atom is called its Atomic number and is denoted by Z

The Nucleus of an atom contains two sub-atomic particles they are protons and neutrons. as these sub-atomic particles are present inside the nucleus they are also called nucleons.

Number of neutrons and protons that is nucleons present in atom is called its Mass number which is denoted by A

⇒ A = number of protons + number of neutrons

we know that isotopes are the elements which have same atomic number but different mass number ⇒ in the above question 6^12C and 6^14C are isotopes.

isobars are the elements which have different atomic number but same mass number ⇒ in the above question 6^12C and 5^12B are isobars

isotones are the elements which have same number of neutrons. ⇒ in the question 6^12C and 7^13N have same number of neutrons that is each contain 6 neutrons.

so the isotope - isotone - isobar of 6^12C are 6^14C - 7^13N - 5^12B

so option (A) is the answer