Question

10TH CLASS
Answer the following questions on the basis of the position of elements in the table
1) which element is most electronegative?
2) write the electronic configuration of B and E?
3) which is most electropositive A or B?
4) which element is acting as noble gas?
PLS HELP ME

Answer 1

Explanation:

1) Fluorine.

2) Group 13 elements outermost or valence electronic configuration is [E]ns2np1, where E is an inert gas. To find the electronic configuration of boron, fill 5 electrons of boron in orbitals according to Aufbau principle. Consequently, electronic configuration of boron will be :1s22s22p1.

3)Thus Beryllium (Be) is the Most electropositive element among them. Aluminium lies below the Boron (B) in periodic table thus it has more electropositivity then Boron, but less then Be.

4)Helium.