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Mass number is the sum of ?

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Biology and Chemistry Tuitions

The total number of nucleons - protons and neutrons in the nucleus of an atom is called the Mass Number
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No of protons and No.of Neutrons
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An Experienced Trainer

Mass number = the sum of number of protons and number of neutrons.
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Balu Physics

Number of Protons and Number of Neutrons
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explain problems in easy method.

mass number it is called as nucleon. nucleon=proton +nuetron
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Biotechnology teaching and research

Mass number is the sum of protons and neutrons, which are together known as nucleons. Mass number is also called as atomic mass number or nucleon number.
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Chemistry

Total number protons and neutrons.
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Don't want to over express myself, just join and feel the experience.

Proton number and neutron number
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CHEMISTRY FACULTY

In atom we have proton ,electron and neutron will be present .Since electron mass is negligible compare with proton and neutron then we will consider mass number of an atom is sum of the proton and neutron.
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Post Graduate in Organic chemistry

The total number of protons and neutron in an atomic nucleus is called Mass number (or) atomic mass number (or) nucleon represented by A
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