Question

15 chemical compounds by using criss cross method of 1-20 atomic numbers

Answer 1

Answer:

If you mix two compounds to form something new, then the new compound has a different chemical composition than the two original compounds. People can use the cross over method to determine formulas for ionic compounds. You need to use a valency table to tell you how many ions an element has and the positive or negative charge on the ions. Once you find the new compound's formula, you can determine what you've created. For example, when you combine sodium (Na) and chloride (Cl), you get NaCl, which is salt.