Mosleygave themodern Long form of periodic tablewhere the base of group was theatomic number.According toMosley's regular law, the physical and chemical properties of facets are periodic functions of theirAtomic number.

You are watching: What is the most electropositive element

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In the long-form periodic table, horizontal rows are referred to as Periods and also vertical rows are dubbed groups.Alkali metals are most electropositive castle lies in group 1.As we down the group an extra covering is included to the nucleus, so outer electron is loosely bounded and can be eliminated easily.Therefore down the team radius increases, metallic character increases and electropositivity also increases.

So, in offered option Potassium (K) will certainly be many eletropositive element.

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Important Points

Cesium (Cs 55) is many electropositive facet in the regular table.
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