Question

what have same mass no but different atomic number





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Answer 1

Answer:

Isobars are atoms of different chemical elements that have the same number of nucleons.Correspondly isobars differ in atomic number (or number of protons) but have the same mass number

Answer 2

ANSWER:

The elements that have same mass number but with different atomic number is called isobars.

EXPLANATION:

• The number usually written on the top of the element is called mass number. It represents the number of nucleons . Nucleons refer to the sum of protons and neutrons present inside the nucleus.

• The number written subscript to the element is atomic number. It represents the number of protons or number of electrons .

• Isobars are the elements that thave same mass number. They have different atomic number.

• So isobars are the two different atoms having same number of nucleons.

Example:

${Ar_{18}}^{40}\:,\:{Ca_{20}}^{40}$

Here Argon has atomic number of 18.

Calcium has the atomic number of 20.

But both have same number of mass number 40. The number of nucleons inside the nucleus is same, but the number of protons, electrons and neutrons are different.