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quiz 1-chemistry
Question | Answer |
---|---|
chemistry | the study of matter |
atom | basic unit of matter |
dalton | all elements are composed of invisible atoms all atoms of a given element are identical atoms of different elements are different(in mass) compounds are formed by the combination of atoms of different elements |
electron | negatively charged particles |
nuetron | neutrally charged particles |
proton | positively charged particles |
"plum pudding model" | the experiment where thompson discovered the electron |
thomson | scientist who discovered the electron |
bohr | discovered that the nucleas is made up of nuetrons & protons and electrons orbit them |
rutherford | discovered that the atom has a nucleaus and its postitively charged and that the vomlume is mainly empty |
wave-mechanical model | discovered that the electrons move in orbitals |
greeks | discovered that matter is composed of tiny,discrete particles |
amu | atomic mass unit |
atomic number | the number of protons in the atom |
elements | are substances that cant be broken down |
compounds | composed of 2 or more elements that chemically combined |
mixtures | combinations of 2 or more pure substances that can be separated by physical means |