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Physical Science
s8p1.a Distinguish between atoms and molecules
Term | Definition |
---|---|
Atom | the basic unit of a chemical element. |
Element | a part or aspect of something abstract, especially one that is essential or characteristic. |
Nucleus | the central and most important part of an object, movement, or group, forming the basis for its activity and growth. |
Proton | a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign. |
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. |
Electron | a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids. |
Atomic number | the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table. |
Neutral | not helping or supporting either side in a conflict, disagreement, etc.; impartial. |
Atomic mass | the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom or to the average number allowing for the relative abundances of different isotopes. |
Chemical symbol | A chemical symbol is a code for a chemical element. It is usually derived from the name of the element, often in Latin. This is an example of an atomic symbol. The text boxes explain where the numbers are derived from. |