Chemistry Past Questions and Answers

Cancerous growths are cured by exposure to

An oxide XO₂ has a vapour density of 32. What is the atomic mass of X?

Millikan's contributions to the development of atomic theory is the determination of

Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal?

An elements X with relative atomic mass 16.2 contains two isotopes ¹⁶₈X with relative abundance of 90% and ^m₈X with relative abundance of 10%. The value of m is