The Modern Atomic Theory

Question 1

Which event would be impossible to explain by using John Dalton’s model of the atom?

Revolt · Accepted Answer

An iron atom emits particles when it is struck by light.

Question 2

Which statement describes a major drawback of the Bohr model that caused scientists to replace it?

Revolt · Accepted Answer

It contradicted the Heisenberg uncertainty principle.

Question 3

Which equation was used by Albert Einstein to explain the photoelectric effect? [E = energy, h = Planck’s constant, and v = frequency.]

Revolt · Accepted Answer

E = hv

Question 4

Which statement about the electron-cloud model is true?

Revolt · Accepted Answer

It is the currently accepted atomic model.

Question 5

Which statement about Niels Bohr’s atomic model is true?

Revolt · Accepted Answer

Each orbit has a specific energy level.

Question 6

The diagram shows Niels Bohr’s model of an atom. What happens when the electron moves from the first energy level to the second energy level?

Revolt · Accepted Answer

Energy is absorbed by the atom.

Question 7

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect?

Revolt · Accepted Answer

Energy of electrons depends on light’s frequency, not intensity.

Question 8

The modern-day quantum model of the atom is better than John Dalton’s model because it

Revolt · Accepted Answer

answers many questions about atoms.

Question 9

Light of a certain energy shines on a metal and causes electrons to be emitted. Based on the research of Albert Einstein, what change would most likely result in stopping the emission of electrons from this metal?

Revolt · Accepted Answer

the use of light that has a lower frequency

Question 10

Which atomic model states that it is impossible to know the exact location of electrons around the nucleus?

Revolt · Accepted Answer

electron-cloud model

The Modern Atomic Theory Answers

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