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Shells of an Atom

All elements ...

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All elements in the third period have(1) Three complete shells(2) Three complete subshells(3) Three valence electrons(4) Three electrons less than octet and How

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Q. Nitrogen molecule, in which each nitrogen atom has ______ electrons in its valence shell and required three electrons to complete the octet.

Q. The period of element having three shells with three electrons in valence shell is:

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Q. Which element has:

(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2, 8, 2?
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(e) twice as many electrons in its second shell as its first shell?

Q. Give the number of the group and the period of the element having three shells with three electrons in valence shell.

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