August 2019 NY Regents Chemistry Exam
1 Which statement describes the earliest model of the atom?
(1) An atom is an indivisible hard sphere.
(2) An atom has a small, dense nucleus.
(3) Electrons are negative particles in an atom.
(4) Electrons in an atom have wave-like properties.
Solution: The earliest model of an atom proposed that an atom is an indivisible hard sphere.
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