Choose from the following: 4Be, 9F, 19K, 20Ca (a) The element having one electron in the outermost shell. (b) Two elements of the same group.

Periodic Classification Of Elements

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22/11/2020 4:02 pm

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romiroy12

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Choose from the following:

4^Be,9^F,19^K,20^Ca

(a) The element having one electron in the outermost shell.

(b) Two elements of the same group.

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22/11/2020 4:02 pm

Anonymous

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(a) 19^K has one valence electron.

(b) 4^Beand 20^Cabelong to the same group.

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