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What is the valency of potassium and calcium?

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Valency of K (pottasium) is +1. You can see that the electronic configuration of K is 2,8,8,1. So,to make an octate,K loses one electron.So,its valency is +1. Now, electronic config. of Ca(calcium) is 2,8,8,2. Thus it loses 2 electronsgainmake an octate of electrons to stabalise itself. Thus its valency is +2. read more

Argon and Xenon have the same number of valence electrons, both are noble gases (group 18 that have 8 electrons). read more

Potassium is an alkali metal. So it contains 1 electron in its valenced shell or orbital. So its valency is also 1. Actually this is the method to calculate valency. Suppose, no. of valence electrons of any atom ='a' When 'a' is less than or equal to 3 then valency of that atom is equal to ‘a’. read more

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