CBSE Class 11-science Answered
Why are 80% of the elements metals in the periodic table??
Asked by Avijit Gupta | 27 Feb, 2012, 10:09: PM
Expert Answer
It has to do with the electronic config, and the outermost electrons. Note the two groups on the left - alkali and alkaline earth from period 2 and down, they are metals. The groups in the middle 3- groups 3-12 (in periods 4-7) are the transition metals (they fill d-subshell). To the right is a region that has some metals, semi-metals, non-metals (in which the p-subshell progressively fills) and to the far right as the p-shell fills, they become gases, and farthest right column with full s2p6 configurations are the noble (monatomic) gases.
Answered by | 28 Feb, 2012, 08:43: PM
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