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प्रश्न
Give a reason for the following:
Helium is chemical extremely unreactive.
उत्तर
Helium has its outermost shell completely filled i.e. 2 electrons in K shell.
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संबंधित प्रश्न
Write the distribution of electrons in carbon and sodium atoms?
Which one of the following is a correct electronic configuration of sodium?
State the number of electrons present in the outermost shell of the atoms of the following elements :(i) Neon
(ii) Chlorine
An atom X has 2, 8, 7 electrons in its shell. It combines with Y having 1 electron in its outermost shell.
Write the formula of the compound formed.
Explain the arrangement and distribution of electrons in the various shells with reference to an atom in general and to an atom of potassium ‘3919K’ with special reference to the 2n2 rule.
Differentiate between the term Duplet and octet rule.
The following element is given \[\ce{_9W}\]. State the electronic configuration and state whether it is a metal, non-metal, or inert gas.
The following element is given \[\ce{_18Y}\]. State the electronic configuration and state whether it is a metal, non-metal, or inert gas.
Explain the octet rule for the formation of –
Sodium chloride from a sodium atom and a chlorine atom.
Explain the octet rule for the formation of –
Nitrogen molecule from two nitrogen atoms.
