Which statement describes the earliest model of the atom?

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.

Answer:1

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