Question

The position of eight elements in the modern periodic table is given below where atomic number of elements given in the parenthesis 1) Li (3) 2)Na (11) K (19) Rb (37) Be(4) Mg(12) Ca(20) Sr(38) 1)Write the electronic Configuration of Ca 2) Pradict the no of balance electrons in Rb 3)What is the ni of shell in Sr 4)Predict whether K is a metal or a non_metal .5) which one of these elements has the largest atom in size .6) Arrange Be,Ca,Mg and Rb in the size of their respective atomic

Answer 1

1) 2,8,8,2
2) 3

4) non metal
5) Rb
6) Rb Ca Mg Be

Answer 2

1) 2,8,8,2

2) 3

4) non metal

5) Rb

6) Rb Ca Mg Be