Name the noble gas not present in the air
(a) Radon
(b) Argon
(c) Krypton
(d) Helium
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These series of the transition elements are shown in Table 8.1. In general the electronic configuration of these elements is (n-1) d1–10 ns1–2.
The (n–1) stands for the inner d orbitals which may have one to ten electrons and the outermost ns orbital may have one or two electrons.
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Answer:
Redon
Explanation:
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