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प्रश्न
Give reason
Actual atomic mass is greater than mass number.
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उत्तर
Actual atomic mass is greater than the mass number because the mass number is a whole number approximation of atomic mass unit. In fact, neutrons are slightly heavier than protons, and an atom has over 200 sub-atomic particles.
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संबंधित प्रश्न
Explain the Mass number with example.
TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
Sulphur has an atomic number 16 and a mass of 32.
State the number of protons and neutrons in the nucleus of sulphur. Give a simple diagram to show the arrangement of electrons in an atom of sulphur.
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
‘Z’ is denoted by ______.
In a neutral atom number of protons is equal to the number of neutrons.
Match the following:
| Column A | Column B | ||
| 1. | Mass of proton | a. | +1 |
| 2. | Mass of electron | b. | -1 |
| 3. | Charge of electron | c. | 9.31 x 10-28g |
| 4. | Charge of proton | d. | 1.67 x 10-24g |
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In which one of the following, the number of protons is greater than the number of neutrons but number of protons is less than the number of electrons?
