9 a Elements A B C and D have atomic numbers 12 19 29 and 36

Last updated: 7/4/2023

9 a Elements A B C and D have atomic numbers 12 19 29 and 36 respectively On the basis of electronic configuration write to which group of the periodic table each element belongs b Predict the blocks to which these elements can be classified Also predict their periods and groups c Which of these are representative elements