How is the Periodic Table arranged?

What are the 3 elements on the periodic table?

What is an atomic number?

What is the mass number of an element?

What are Protons?

What are Neutrons?

What are Electrons?

How many electrons are in an electron shell?

How are electrons arranged in atoms?

What is a chemical reaction?

What is a physical-chemical change?

What is a chemical change?

What are reactants in a Chemical reaction?

What are the products of a chemical reaction?

What's the Law of Conservation Mass?

How are ions formed to create stable atoms?

What are cations?

What are anions?

How are anions and cations different due to their properties?

What are isotopes?

what is the different form of an isotope with fewer neutrons in its atom?