Question

explain with example
(I) atomic number (ii) Mass number (iii)isotopes and(iv) isobars​

Answer 1

Answer:

Mass number:The number of the neutrons and protons present in the nucleus is called mass number. ... Isobars: Isobars are the same elements having different atomic number but same mass number. USES OF ISOTOPES: (a) It is used as a uranium for the nuclear reactor (b) It is used as cobalt for treating blood cancer......

Answer 2

Answer:

$\huge\mathcal\blue{Hello}$

Explanation:

${\huge{\rm{\underline{\underline{(i) Atomic\:Number}}}}}$

✍️ Atomic number of an atom is decided by the number of protons present in the atom.

✍️ It is denoted by 'Z'.

✍️ All atoms of an element have same number of protons.

Example: Sodium(Na) has 11 protons hence it's atomic number will be 11.

${\huge{\rm{\underline{\underline{(ii)Mass\:number }}}}}$

✍️After studying about the sub-atomic particles, we can say that the mass is an atom is due to protons and neutrons present in its nucleus.

✍️ Therefore mass of an atom resides in its nucleus in the form of nucleons.

✍️ Mass number is denoted by A.

Example: Mass number of carbon is 12 i.e., the atom has 6 protons and 6 neutrons.

$\therefore$ Mass number of an atom is the sum of all protons and neutrons present in nucleus.

${\huge{\boxed{\sf{\green{A=n+p}}}}}$

${\huge{\rm{\underline{\underline{(iii)Isotopes}}}}}$

✍️ Isotopes are the atoms of same element which have same atomic number( number of protons) but different mass numbers.

Example: (i) Isotopes of hydrogen

✍️ Protium

✍️ Deuterium

✍️ Tritium

${\huge{\rm{\underline{\underline{(iv)Isobars}}}}}$

✍️ Isobars are the atoms of different elements with different atomic numbers but same mass number.

Example: Argon and Calcium are isobars of each other

Hope it helps you