Question

……………………… is equal to sum of number of proton and neutron.​

Answer 1

Explanation:

mass number

mass numberThe mass number is the sum of the number of protons and the number of neutrons in an atom.

Answer 2

Concept: Every atom has a proton, a subatomic particle, in its nucleus. The particle possesses an electrical charge that is positive and opposite to the electron's.

Every atom's nucleus has a neutron, with the exception of plain hydrogen, which does not. The fact that the particle has no electrical charge—it is neutral—gives it its name. Neutrons have a very high density.

Given: ……………………… is equal to sum of number of proton and neutron

To find: the blank

Solution:

Mass number is equal to sum of number of proton and neutron.​

• The mass of an atom is determined by the sum of the protons and neutrons.
• It is symbolised by the letter "A."
• Since protons and neutrons coexist in the atom's nucleus, they are collectively referred to as nucleons.
• For instance, a carbon atom contains 6 protons and 6 neutrons. Its mass number is 12 as a result.
• All atoms of an element have the same amount of protons, although they can have different numbers of neutrons. As a result, various isotopes of the same element can have different mass values.
• An electron weighs practically nothing. As a result, an atom's atomic mass and mass number are practically equal.

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