Mention the groups belonging to s- block of the Modern Periodic Table? d) What trend is seen in the non-metallic character of the elements as we go from left to right within a period?
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1. s-block consists of 2 groups. Group 1 is called Alkali metals and Group 2 is called Alkaline earth metals.
2. As we go from left to right in a period, the non metallic character increases.
Explanation: In a period, as we go from left to right, the number of valence electrons goes on increasing whereas the number of shells remains the same.
Hence, the nuclear charge increases, thereby increasing the electron-nucleus attraction and consequently decreasing the atomic size.
This increases ionization energy and therefore gives non-metallic character to the elements.
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