Out of the following elements, phosphorus, iron, copper, sulphur, silver, iodine, boron, titanium, the number of elements that don't show ductility is:

Q. The number of elements that show ductility among the following is?

Q. Among the following, the number of elements that do not show malleability is:
Zinc, Iron, Sulphur, Copper, Aluminium, Nickel, Chlorine, Iodine

Q. Find the odd one out of the following and explain your choice:
(a) Sulphur, Phosphorus, Carbon, Iodine
(b) Copper, Lead, Zinc, Mercury

Q. Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :
(a) copper and sulphur
(b) sulphur and iron
(c) phosphorus and nitrogen
(d) nitrogen and iron

Q.

State the chemical symbols for the following elements:

Sodium, Potassium, Iron, Copper, Mercury, Silver.