Exam (elaborations)
Chemistry atom Questions and Answers
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Exam of 3 pages for the course Atom at Atom (Chemistry atom)
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Chemistry atomAtom - answer Smallest particle of an element that retains the properties of the element
The number of protons equal _____ - answer The number of electrons
Electron - answer A negatively charged, fast-moving particle with an extremely small
mass that is found in all forms of matter and moves through the empty space
surrounding an atoms nucleus
Proton - answer A subatomic particle carrying a charge equal to but opposite that of an
electron
Neutron - answer A subatomic particle that has a mass nearly equal to that of a proton
but carries no electric charge
Dalton's atomic theory - answer Matter is composed of extremely small particles called
atoms
Plum pudding model - answerA model that consisted of a spherically shaped atom
composed of a uniformly distributed positive charge in which the individual negatively
charged electrons recited
Rutherford's nuclear atomic model - answerAnd Adam consisted mostly of empty space
through which the electrons move; almost all of the items positive charge and almost all
of its mass were contained in an atom; the negatively charged electrons are held within
the atom by their attraction to the positively charged nucleus
Where is the proton located - answerNucleus
Who discovered the neutron - answerJames Chadwick
Where is the neutron located - answerNucleus
Who proposed that the atom has only certain allowable energy states - answerNiels
Bohr
Isotopes - answerAtoms with the same number of protons but different number of
neutrons
Mass number - answerSome of the atomic number or protons and neutrons
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