an element E contains 19 protons and 20 neutrons . the ion formed by E ,DURING THE FORMATION A STABLE COMPOUND ,IS
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19 protons and 20 neutrons. It has 19 electrons in the atom.
So, electron distribution in the shells and sub shells is :
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
Since there is one electron in the valency shell, its valency is 1. It loses the single electron and forms a positive ion with single charge. E⁺ or E+.
So, electron distribution in the shells and sub shells is :
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
Since there is one electron in the valency shell, its valency is 1. It loses the single electron and forms a positive ion with single charge. E⁺ or E+.
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