(a) An element X has mass number 40 and contains 21 neutrons in its at

1.	(a) An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong? (b) The element X forms a compound X2Y. Suggest an element that Y might be and give reasons for your choice.
Answer» (a) An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong? (b) The element X forms a compound $X_{2}$ Y. Suggest an element that Y might be and give reasons for your choice.

(a) An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong? (b) The element X forms a compound X2Y. Suggest an element that Y might be and give reasons for your choice.

Answer»

(a) An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong?

(b) The element X forms a compound $X_{2}$ Y. Suggest an element that Y might be and give reasons for your choice.