Evolution of Atomic Theory

This is the most complete and current model of the atom. Electrons are located in complex orbitals.

• The "Rutherford Model" of the atom

• The "Quantum Mechanical Model" of the atom

• The "Plum Pudding Model" of the atom

• The "Bohr Model" of the atom

• The "Golf ball Model" of the atom

Which of the following statements about atoms is FALSE?

• Atoms compose all matter.

• Atoms are responsible for the sensation of smell.

• Atoms are the basic building block of nature.

• An atom is the smallest identifiable unit of an element.

• All of the above statements are true.

Which statement below accurately describes the contributions of Democritus?

• ancient Greek philosopher who proposed that matter was not continuous

• created the modern periodic table

• proposed the modern Atomic Theory

• discovered the existence of electrons

• none of the above

Which statement below accurately describes the contributions of Dalton?

• ancient Greek philosopher who proposed that matter was continuous

• created the modern periodic table

• proposed the modern Atomic Theory

• discovered the existence of electrons

• none of the above

Which statement below accurately describes the contributions of Thomson?

• ancient Greek philosopher who proposed that matter was continuous

• created the modern periodic table

• proposed the modern Atomic Theory

• discovered the existence of electrons

• none of the above

Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford?

• Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus.

• Electrical charge is a fundamental property of protons and electrons in which like charges repel and opposite charges attract.

• Most of the volume of the atom is empty space occupied by tiny, negatively charged electrons.

• There are as many electrons outside the nucleus as there are protons inside the nucleus in a neutral atom.

• All of the above statements are consistent.

This model was the first to show a nucleus, consisting of protons and neutron.  Electrons surround the nucleus but are not shown in distinct energy levels. 

• Democritus's model of the atom

• The "Rutherford Model" of the atom

• The "Plum Pudding Model" of the atom

• The "Quantum Mechanical Modell" of the atom

• The "Golf ball Model" of the atom

Which statement reflects the results of Rutherford's gold foil experiments?

• Almost all of the alpha particles were deflected back in the direction from which they came.

• Almost all of the alpha particles sputtered gold atoms off of the surface of the foil.

• Almost all of the alpha particles were deflected while passing through the foil

• Almost all of the alpha particles passed directly through the foil.

• none of the above

The atom is the fundamental building block of everything we hear, feel, see, and experience.

• True

• False

An atom is the smallest identifiable unit of a compound.

• True

• False