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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
State the number of electrons present in the outermost shell of the atoms of the following elements :(i) Neon
(ii) Chlorine
Which of the following represents the correct electron distribution in magnesium ion?
Give scientific reason.
Atomic mass number is a whole number.
Draw a neat labelled diagram.
Diagramatic sketch of electronic configurations of magnesium (Atomic number 12)
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 Stable and unstable electronic configuration.
Differentiate between the term Duplet and octet rule.
Name an element which has the same number of electrons in its first and second shell.
The electron distribution in an aluminium atom is
How will you define the term ‘electronic configuration’?
