Question

Assertion : The mass of the total number of protons and neutrons is a measure of the

approximate mass of an atom.

Reason : The mass of an electron is negligible.​

Answer 1

Answer:

The assertion and reason provided are correct.

Explanation:

• The quantity of protons and neutrons in an atom's nucleus determines its mass.
• Since the mass of an electron is insignificant compared to that of a proton or neutron, it has little effect on the total mass of an atom.
• Due to the fact that an electron has a very small mass, the mass of all the protons and neutrons together serves as a proxy for the approximate mass of an atom.

To know more about protons , check out :

https://brainly.in/question/374445

To know more about atom , check out :

https://brainly.in/question/55523

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Answer 2

In the question the assertion is correct but the reason for the assertion is not completely correct. But partially correct,

Explanation for the above statement:

The atomic mass is called as the total number of protons and neutrons together in its nucleus. Because of this reason, the mass of the total number of protons and neutrons is a measure of the approximate mass of an atom.

On the other hand ,the mass of an electron is smaller than as compared to the proton and neutron, but it is not negligible. Mass of a proton is (1.6726219×10−27kg),almost 1837 times that of the electron which means electron can effect but its less effective and sometimes when performing measurements, the mass of electrons can effect on the mass of an atom. So the mass of an electron is not completely negligible. so it is partially correct.

So the assertion and reason are correct but reason is partially correct.

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