Chemistry Past Questions and Answers

²²⁶₈₈Ra → ^x₈₆Rn + α - particle
What is the value of x in the nuclear reaction above?

The property of chlorine which causes hydrogen chloride to be more ionic than the chlorine molecules is its

Chlorine consisting of two isotopes of mass number 35 and 37 in the ratio 3:1 has an atomic mass of 35.5. Calculate the relative abundance of the isotopes of mass number 37

Which of the following mixture of gases is likely to burn in flame

Hardness of water is caused by the presence of ions of