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S8Pl.a
Distinguish between atoms and molecules
Term | Definition |
---|---|
atom | the smallest unit of an element that maintains the properties of that element |
element | a substance that cannot be separated or broken down into simpler substance by chemical |
nucleus | in physical science, an atom's central region, which is made up of protons and neutron |
proton | a subatomic particle that has a positive change and that is found in the nucleus of an atom |
electron | a subatomic particle that has a negative change |
atomic number | the number of protons in the nucleus of an nucleus of an atom, the atomic is same for all atoms of in element |
neutral | having no overall change |
atomic | the mass of an atom expressed in atomic mass unit |
chemical symbol | a one-or two-letter code that represents an element |
neutron | a substance particle that has no change and that is found in the nucleus of an atoms |