Atomic Models

Bohr Model of an atom

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Democritus' model of an atom

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Quantum Mechanical Model of an Atom

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Dalton's Atomic Model

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Rutherford's atomic model

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Joseph John Thomson's Atomic Model

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Which discovery/invention disproved Dalton's postulate about atoms that states "atoms can neither be created nor destroyed"?

• Internal combustion engine

• Orbitals

• Energy level

• Nuclear energy

Which of the following follows Dalton's postulate about definite composition and proportion?

• Different isotopes of Hydrogen

• Atoms of different metals are different from each other

• All types of fuel can produce the same amount of products

• All molecules of carbon dioxide is composed of two oxygen atoms and an atom of carbon.

Which of the following is an evidence that only the nucleus has the mass of an atom?

• They are not easily removed from the atom.

• The nucleus can't be changed by ordinary means.

• Alpha particles are deflected by the nucleus.

• It is attracted to the negatively charged electrode.

Which of the following is the useful application of the quantum mechanical model?

• mole concept

• Predicting chemical reactions

• Predicting metallic properties of atoms

• Predicting molecular shape