Question

Explain with examples i) Atomic number, (i) Mass number.
(iii) Isotopes and iv) Isobars. Give any two uses of isotopes.
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Answer 1

Answer:

i) Atomic number The atomic number of an element is the total number of protons present in the atom of that element. For example, nitrogen has 7 protons in its atom. Thus, the atomic number of nitrogen is 7. (ii) Mass number The mass number of an element is the sum of the number of protons and neutrons present in the atom of that element. For example, the atom of boron has 5 protons and 6 neutrons. So, the mass number of boron is 5 + 6 = 11. (iii) Isotopes They are atoms of the same element and have same atomic number but different mass number/atomic mass. For example: Carbon: 6C12 and 6C14 (iv) Isobars They are atoms of different elements having same mass number but different atomic number. For example calcium, atomic number 20 and argon, atomic number 18. The number of electrons in these atoms is different, but the mass number of both these elements is 40. That is, the total number of neutrons is the same in the atoms of this pair of elements. Two uses of isotopes are as follows: (i) An isotope of uranium is used as a fuel in nuclear reactors. (ii) An isotope of cobalt is used in the treatment of cancer.Read more on Sarthaks.com - https://www.sarthaks.com/10969/explain-with-examples-atomic-number-mass-number-iii-isotopes-isobars-give-uses-isotopes

Explanation:

Answer 2

Answer:

Answer:-

(1) Atomic Number :- Atomic Numbers can be define as the number of protons present in the Nucleus of an Atom. It is denoted by "Z".

Ex:- Number of Protons in Carbon is 6. Hence, It Atomic Number is 6.

(2) Mass Number:- Mass Number can be define as the sum of Number of Protons and Number of Neutrons in the Nucleus of an Atom. It is denoted by "A".

Ex:- Number of Protons in Carbon is 6 & Number of Neutrons in Carbon is 6.

Hence, Mass Number is 12.

(3) Isotopes :- Isotopes are define as the Elements having Same Atomic Number but different Mass Number.

(4) Isobars:- Elements having Same Atomic Mass but different Atomic Number are said as Isobars.

USES OF ISOTOPES:-

☆Used as tracers for diagnostic purposes.

☆ Used as Medicine.