Question

Q11. An element having atomic number 15 and atomic mass 31 can catch
fire easily at room temperature. Name the element and its valency.
O (a) Sulphur; -2
O (
(b) Phosphorous; -2
(c) Sulphur, +2
0 (d) Phosphorous; -3​

Answer 1

Answer:

An element having atomic number 15 and atomic mass 31 can catch

fire easily at room temperature. Name the element and its valency.

phosphorus;-2