A 2, 8, 1
B 2, 8, 7
C 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?
(b) Elements B and C are non-metal.
(c) Element A and B will combine to form an ionic bond.
(d) Covalent bond is formed by the combination of elements B and C.
(e) Element B will form an anion with valency 1 since it needs only 1 electron to complete its octet.