Question

Definition of isotopes isobars isotones in physics

Answer 1

Isotopes - each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
Isobars- each of two or more isotopes of different elements, with the same atomic weight.
Isotones - Two nuclides are isotones if they have the same neutron number N, but different proton number Z. For example, boron-12 and carbon-13 nuclei both contain 7 neutrons, and so are isotones. Similarly, ³⁶S, ³⁷Cl, ³⁸Ar, ³⁹K, and ⁴⁰Ca nuclei are all isotones of 20 because they all contain 20 neutrons. 

Answer 2

Answer:

✡Isotopes✡

Isotopes are the atoms of the same element having same atomic number but different mass number.

example

³⁵Cl { Chlorine }

¹⁷

✡Isobars✡

Isobars are the atoms of different elements having different atomic number but the same mass number.

example

⁴⁰Ar { Argon } and ⁴⁰Ca { Calcium }

¹⁸ ²⁰

✡Isotones✡

Isotones are the atoms of different elements having same number of neutrons.

example

¹³C { Carbon } and ¹⁴N { Nitrogen }

⁶ ⁷

Explanation:

✡more to know✡

(Mass number)

⬇

¹

X ⬅ symbol of element

¹

⬆

(Atomic number)

example-

¹¹B

⁵

here,

B is symbol of element

11 is mass number

5 is atomic number

✡What is atomic number??✡

The number of unit positive charge carried by the nucleus of an atom is termed as atomic number.

✡what is mass number??✡

The sum of the neutrons and protons is called mass number.

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