1.

Write the sub shell electronic configuration of the following elements and find the blocks to which they belong. a. 4Be: …….. b. 26Fe…….. c. 18Ar: ……

Answer»

a. 4Be : 1s2 2s2 — s block 

b. 26Fe : Is2 2s2 2p6 3s2 3p6 3d6 4s2 — d block 

c. 18Ar : 1s2 2s2 2p6 3s2 3p6 — p block



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