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s8p1.a
distinguish between atoms and molecules
Term | Definition |
---|---|
Atoms- | the smallest unit of an element that maintains the properties of that element. |
Element- | a substances that cannot be separated or broken down into simpler substances by chemical means. |
Nucleus- | in physical science, an atom's central region, which is made up of protons and neutrons. |
Proton- | a subatomic particle that has a positive charge and that is found in the nucleus of an atom. |
Neutron- | a subatomic particle that has no charge and that is found in the nucleus of an atom |
Electron- | a subatomic particle that has a negative charge |
Atomic number- | the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an a element |
Neutral- | having no overall charge |
Atomic mass- | the mass of an atom expressed in atomic mass units |
Chemical symbol- | a one-or two-letter code that represents an element. |