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S8P1.a
Distinguish between atoms and molecules
Question | Answer |
---|---|
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 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. |
Electron | a subatomic particle that has a negative charge |
Atomic mass | the mass of an atom expressed in atomic mass units |
Neutral | having no overall charge |
Chemical symbol | a one- or letter code that represents an elements |
Atomic number | the number of protons in the nucleus of an element |
neutron | a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen. |