The electronic configurations of three elements A, B and C are as foll

1.	The electronic configurations of three elements A, B and C are as follows :A 2, 8, 1B 2, 8, 7C 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 ?
Answer» (a) A is a metal (b) B and C are non-metals (c) A and B combines to form an ionic bond. (d) B and C combines to form a covalent bond. (e) B will form an anion with valency 1 since it needs only 1 electron to complete its octet

The electronic configurations of three elements A, B and C are as follows :A 2, 8, 1B 2, 8, 7C 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 ?

Answer»

(a) A is a metal

(b) B and C are non-metals

(d) B and C combines to form a covalent bond.

(e) B will form an anion with valency 1 since it needs only 1 electron to complete its octet