Which one among the following are the correct symbols for the elements gold, tin and lead, respectively?

Which one of the following is the correct order of the valencies of elements Ne, Si, N and Mg?

Identify the correct pair of elements among the following which are liquid at room temperature and standard pressure.

Consider the following statements with respect to noble metals : 1. Noble metals are found in pure form in nature. 2. Uranium and lead are examples of noble metal. Which of the above statements is ar…

Which of the following elements is not a Noble gas?

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