Rutherford's alpha particle scattering experiment eventually led to the conclusion that:

Complete and balance the following equation:

Ag⁺ + AsH₃ $$\to$$ H₃AsO₃ + H⁺

The sum of the number of neutrons and proton in the isotope of hydrogen is

Arrange the following in:
Increasing size:
Cl^-, S^2-, Ca²⁺, Ar