Seeley's Anatomy & Physiology chapter 2 | Questions and Answers with complete solution
Matter - Anything that occupies space and has mass Mass - Amount of matter in an object Weight - Force exerted by earth's gravity on matter Element - Simplest type of matter; composed of only one kind of atom Atom - Smallest particle of an element. Consists of protons, neutrons, and electrons Protons - Positively charged; located in the nucleus Electrons - Negatively charged; located around the nucleus Neutrons - No charge; located in the nucleus Atomic number - Unique number of protons in atom Mass number - Sum of protons and neutrons Isotopes - Atoms that have the same atomic number, but different mass numbers Atomic mass - Average mass
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