" 6.Which of the given elements "A,B,C,D" and "E" with atomic number "

Which of the given elements A,B,C,D and E with atomic number 2,3,7,10 and 30 respectively belong to the same period ?

Which of the given elements A,B,C,D and E with atomic number 2,3,7,10 and 30 respectively belong to the same period ?

Which of the given elements A , B , C , D and E with atomic numbers 2 , 3 , 7 , 10 and 30 respectively belong to the same period ?

Which of the following elements A , B , C , D and E with atomic numbers 3 , 11 , 15 , 18 , and 19 respectively belong to the same group ?

Write the electronic configuration of the elements A, B, C, D, E with atomic numbers 5, 6, 14, 13 and 15. Which have similar chemical properties ?

What valencies will be shown by the elements A, B, C, D and E having atomic numbers 2, 4, 8, 10 and 13 respectively.

The following table shows the position of five elements A, B, C, D and E in the modern periodic table. Answer the following giving reasons: (i) Which element is a metal with valency two? (ii) Which element is least reactive? (iii) Out of D and E which element has a smaller atomic radius?