What kind of generalization can you make about how the number of protons and neutrons are related to each other in the elements ?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?