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distinguish between atoms and molecules
Question | Answer |
---|---|
atom | the smallest unit of an element that maintains the properties of that element |
elements | a substance that cannot be separated or broken down into simpler substances by chemical mean |
nucleus | in physical science an atoms central region which is made up of protons and neutrons |
protons | a subatomic particles that has a positive charge and that is found in the the nucleus of an atom |
neutron | a sub atomic particle that has a negative charge |
atomic number | the number of protons in the nucleus of and atom the atomic number id the same for all atoms of an 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 reprsents and element |
eletrons | a subtomic particle that has a negative charge |