What is the diffrence between atomic no. & atomic mass and how we cal. them?
Answers
Answered by
0
Mass number is the number of protons and neutrons in an atom, and it tells us about the mass of the atom in amu, or atomic mass units. Atomic mass is the average mass of all the isotopes of a certain type. It is a weighted average that takes into account the abundances of all of the different isotopes.
Payal5690:
If it was helpful then mark as brainliest
Answered by
1
Mass number" is simply the number of nuclear particles (protons and neutrons).
"Atomic mass" is the actual mass of the atom. Keep in mind that protons and neutrons do not have masses of exactly one amu. Even if they did, the mass of the nucleus is not the sum of the masses of the nuclear particles.
There is only one isotope of one element for which the mass number and atomic mass are exactly the same. That is carbon-12, and happens because the amu is defined as 1/12 of the mass of a carbon-12 atom.
"Atomic mass" is the actual mass of the atom. Keep in mind that protons and neutrons do not have masses of exactly one amu. Even if they did, the mass of the nucleus is not the sum of the masses of the nuclear particles.
There is only one isotope of one element for which the mass number and atomic mass are exactly the same. That is carbon-12, and happens because the amu is defined as 1/12 of the mass of a carbon-12 atom.
Similar questions