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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
Complete the following table.
| Atomic number | Mass number | Number of Neutrons | Number of protons | Number of electrons | Name of the Atomic species |
| 9 | - | 10 | - | - | - |
| 16 | 32 | - | - | - | Sulphur |
| - | 24 | - | 12 | - | - |
| - | 2 | - | 1 | - | - |
| - | 1 | 0 | 1 | 0 | - |
What are the atomic numbers of elements whose outermost electrons is represented by 3p5?
In Milikan’s experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is - 1.282 × 10-18C, calculate the number of electrons present on it.
Fill in the blanks- The number of protons in the nucleus of an atom is called its ....................
Give reason
Actual atomic mass is greater than mass number.
State the main postulates of Dalton’s atomic theory.
‘Valency is the number of hydrogen atoms which can combine with [or displace] one atom of the element [or radical] forming a compound’. With reference to the above definition of valency, state the valency of chlorine in hydrogen chloride, giving reasons.
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]
An element ‘A’ has mass number 23 and atomic number 11. State the –
- no. of neutrons in its shell,
- electronic configuration of the element ‘A’.
K and L shells can accommodate a maximum of 2 and 8 electrons respectively.
