The Modern Atomic Theory

How does the electron-cloud model describe electrons?

An electron has a high probability of being in certain regions.

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

Each orbit has a specific energy level.

The Bohr model of the atom explained why emission spectra are discrete. It could also be used to explain the photoelectric effect. Which is a correct explanation of the photoelectric effect according to the model?

Electrons need specific amounts of energy to jump levels and be emitted.

According to the Bohr model of an atom, what happens when an electron moves from the second energy level to the third energy level and then back to the second energy level?

Energy is absorbed and then released to form an emission line.

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

Energy is absorbed by the atom.

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

It contradicted the Heisenberg uncertainty principle.

Which statement about the electron-cloud model is true?

It is the currently accepted atomic model.

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

answers many questions about atoms.

Natalie observes these characteristics in the model of an atom.(i) includes positive charge(ii) contains electrons(iii) explains the photoelectric effect(iv) suggests the probable location of electronsWhich model is Natalie most likely examining?

electron-cloud model

A change in which property of light will have no effect on whether or not the photoelectric effect occurs?

intensity