BantiBatu Asked: December 2022 1.which of the following is an impure substance?a oxygen b nitrogen c sugar solutiond sodium chloride2. which of the following
BantiBatu Asked: December 2022 1. lf one atom of an element contains 20 neutrons and 20 protons then what is the mass number of that atom?a
BantiBatu Asked: December 2022 a please answer it step by stepand its correct answer will be 38 so please answer it step by step