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प्रश्न
Multiple Choice Questions
If the atomic number of an atom is 17 and mass number is 35 then number of neutron will be
पर्याय
35
17
18
52
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उत्तर
18
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संबंधित प्रश्न
Explain the Mass number with example.
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What is its atomic number and mass number?
Fill in the following blanks in respect of an atom of an element
| No. of protons | No. of neutron | Mass number | Atomic number | No. of electrons | Symbol |
| 11 | 12 | ___________ | ___________ | ___________ | ________ |
What is meant by the 'atomic number of an element'?
State the main postulates of Dalton’s atomic theory.
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Lithium [At. no. = 3, Mass no. = 7]
Elements X, Y, Z have atomic numbers 6, 9 and 12 respectively. Which one:
- forms anion – negative ion;
- forms cation – positive ion;
- has 4 electrons in the outermost orbit. [Y, Z, X]
What are nucleons? How many nucleons are present in Phosphorous? Draw its structure.
The particles that make up the atom are called ______ particles.
Name the 3 sub-atomic particles of an atom.
