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method to predict the period group and block of be an element

method to predict the period group and block of be an element

Grade:12th pass

1 Answers

Prakhar Srivastava
13 Points
7 years ago
Group = no. Of valance electronsFor eg. Chlorine valenece electron = 7 Group = 7A or 17Period = no. Of shellsFor eg. Chlorine no. Of shells = 3 Period = 3

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