Compounds are made up of two or more different kinds of atoms A compound has

Compounds are made up of two or more different kinds

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Compounds are made up of two or more different kinds of atoms. A compound has the same relative numbers and types of atoms.
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Law of Constant Composition- Compound always has the same composition. Therefore, a compound always has the same properties Atoms are not created or destroyed in chemical reactions. A chemical reaction changes the way the atoms are grouped together. Law of Conservation of Mass- matter can neither be created nor destroyed. The total mass of matter at the end of the experiment is exactly the same as that at the beginning. Atoms Atom- smallest unit of matter, made of smaller subatomic particles particles (protons, neutrons, and electrons) Atoms is derived from a Greek word that means “cannot be divided” Nucleus- the center of an atom, formed by protons and neutrons, electrons surround the nucleus (orbit) Protons- positively charged particles Neutrons- electrically neutral particles, which means they have no charge Electrons- negatively charged particles with almost no mass Atomic Mass Unit (amu) A unit of the scale relative masses of atoms Mass Number (A)- the number of protons + number of neutrons in the nucleus of an atom.
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