Four elements A B C and D have atomic no. 12 13 14 15 assign position of D element in the modern periodic table
croonersworld148:
D is present in the 15th group in 3rd period. Because the atomic number of D is 15 and its electronic configuration is 2,8,5. It has three shells so the number of period will be 3. And the number of electrons in valence shell is 5 so the number of group will be 10+5=15.
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Explanation:
A :- Group 2 and 2nd Period .
B :- Group 3 and 2nd Period .
C :- Group 14 and 2nd Period .
D :- Group 15 and 2nd Period .
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