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प्रश्न
Choose the correct option:
The mass number of an atom whose unipositive ion has 10 electrons and 12 neutrons is :
विकल्प
22
23
21
20
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उत्तर
23
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संबंधित प्रश्न
All the gases from cathode rays and anode rays when electricity is passed through them :What does the formation of cathode rays tell us about the atoms?
How does an electron differ from a neutron?
The subatomic particle called electron was discovered by :
The atom of an element X has 7 electrons in its M shell.
What type of ion will be formed by an atom of element X? Write the symbol of the ion formed.
What could element X be?
Explain the rule according to which electrons are filled in various energy levels.
Write down the electronic configuration of the following:
(a) `""_13^27"Y"`
(b) `""_17^35"Y"`
Name or state the following:
Ion formed by the gain of an electron(s)
Write down the electronic configuration of the following
- 2713X,
- 3517Y.
Write down the number of electrons in X and neutrons in Y and the formula of the compound formed by X and Y.[XY3]
What are the noble gases?
Helium has two electrons in the outermost orbit and so it is chemically inert.
