Ratio of neutrons to protons and <span>number of electrons in the outer shell</span>
Answer:
The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system. Lavoisier's finding laid the foundation for modern chemistry and revolutionized science.
Explanation:
Ions.......is your answer
A theory does not change into a scientific law with the accumulation of new or better evidence. A theory will always remain a theory