Element X forms a chloride with the formula XCl₂, which is a solid with high melting point. X would most likely be in the same group of periodic table as

In which of the following pairs are the element found in the same period of the periodic table?

Which one of the following is the most fundamental characteristic of an element ?

Which of the following elements is not a Noble gas?

Which of the following sets of elements has the same valency?

Consider the following statements relating to the Modern Periodic Table: 1. The atomic radius increases on moving from left to right across a period. 2. Germanium, Tellurium, and Copper are transitio…