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प्रश्न
Explain the Mass number with example.
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उत्तर
The mass number of an element is equal to the sum of the number of protons and the number of neutrons present in it.
Example: Number of protons in carbon = 6
Number of neutrons = 6
Hence mass number = Number of protons + Number of neutrons
= 6 + 6
= 12
APPEARS IN
संबंधित प्रश्न
State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
`""^12""_6C, ""^16""_8O, ""^19""_9F, ""^20""_10Ne, ""_13""Al""^27, ""_17""Cl""^35`
Also, draw atomic diagrams for them.
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What is the significance of atomic numbers in the modern Periodic Table?
State the main postulates of Dalton’s atomic theory.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
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- Atomic number = number of protons + number of electrons
- Mass number = number of protons + number of neutrons
- Atomic mass = number of protons = number of neutrons
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The elementary particles such as protons and neutrons are collectively called ______.
