Perhaps, this is an easy question, but still induces a lot of confusion to my self. I might not be the only one confused with the meaning of these concepts so it can help a ton to people, like me, confused with their meaning. So here is my confusion, Matter, as I researched it, although instead of relieving me of my distress made it worse, is said to be everything, everything is matter, according to what i read in the websites I browsed, that said, matter is atoms, electrons, neutrons, protons, and etc. Furthermore, I am considered matter as well as every objects and other human beings as well. Although, atoms are said to be the building blocks of matter. What i mean to say is that, according to what i read online, matter is made of building blocks of atoms, to which atoms make up matter, so my confusion is if atoms, electrons, protons are matter, then why are atoms considered matter. That is one of the points I really need to be cleared so please help me out. One more thing is, Mass is said to be the quantity of matter, according again to what I researched online, but I've read somewhere that electrons, protons has mass, but if electrons and protons are matter, then why does it has mass, which is said to be the quantity of matter. Please create a comprehensive explanation of this concepts, as clear possible.