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प्रश्न
The atomic number of an element is 9, it has 10 neutrons. Find the element from the periodic table. What will be its mass number?
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उत्तर
The element is Fluorine
Its mass number A
= n + p
= 10 + 9 = 19
∴Mass number of Fluorine = 19
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संबंधित प्रश्न
Explain the Mass number with example.
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Multiple Choice Questions
If the atomic number of an atom is 17 and mass number is 35 then number of neutron will be
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Rutherford won the Nobel Prize in 1908 for his investigations in the field of ......................
Fill in the blanks- The number of protons in the nucleus of an atom is called its ....................
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
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(i) mass number of phosphorus,
(ii) atomic number of phosphorus, and
(iii) electron configuration of phosphorus.
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Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
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