1.

The electronic configurations of four elements A, B, C and D are as follows: A 2, 8, 1 B 2, 8, 7 C 2, 8, 8 D 2, 4 (a) Which of these elements is a metal?(b) Which of these elements are non-metals?(c) Which two elements will combine to form an ionic bond?(d) Which two elements will combine to form a covalent bond?(e) Which element will form an anion of valency 1?(f) Which element is a noble gas?

Answer» The electronic configurations of four elements A, B, C and D are as follows:



















A 2, 8, 1
B 2, 8, 7
C 2, 8, 8
D 2, 4

(a) Which of these elements is a metal?

(b) Which of these elements are non-metals?

(c) Which two elements will combine to form an ionic bond?

(d) Which two elements will combine to form a covalent bond?

(e) Which element will form an anion of valency 1?

(f) Which element is a noble gas?


Discussion

No Comment Found