The valence shell of the element X contains I electron in s su
tement contains I electron in 5s subshell and below that shell. 4 electrons
in 4d subshell. The element belongs to which group (IUPAC) in periodic table
(A) 4th group
(B) 5th group
(C) 6th group
(D) 7th group
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Answer:
(A) 4th group
Because the atomic no. should be around 25-30 .So that it occupies 5s subshell and 4d subshell
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