Answer:
The correct answer from the choices, which are included in the comments section, is:
- D. Answers many questions about atoms
Step-by-step explanation:
Let's go through every choice from the list:
A. Easier to understand:
Incorrect.
Quantum model is not quite easy to understand. On the contrary, it is complex and quite hard to understand.
John Dalton's model was the first scientific model of the atom. It depicted the atom as indivisible, extremely tiny particles that constitute all matter.
Many facts were discovered later: the atom is not indivisible, there are some subatomic particles (electrons, protons and neutrons), the electrons are not in fixed positions (orbits) that were progresively explained by new models: J.J Thomson's model, Ernest Rutherford's model, Niels Bohr's model, and, the last and current one, the quantum model/
So. it is not easier to understand but more complete.
b. is a more recent theory
Incorrect.
As said, John Dalton's theory was the first scientific theory of the atom. It was developed in the first half of XIX century. It is, definetly, no a more recent theory. Modern-day quantum model is the most recent theory of the atom.
C. Can be represented in two dimensions
Incorrect.
Modern-day quantum model represents the electrons in a 3-D arrangement around the atom's nucleus, like a "cloud" without definite size. Two dimensional representation is not a characteristic that defines how the modern-day quantum model of the atom is better than other models.
D. Answers many questions about atoms
Correct. Indeed, every model of the atom after John Dalton's model explains more facts about the atoms: J.J Thomson's explained that the negative charges are particles inside the atom (electrons); Ernest Rutherford's model explained the existence of the nucleus with protons, while the electrons are surrounding the atom; Bohrs model explained that the electrons cannot decay into the atoms' nuclei, because they can only have certain enery levels; and the modern-day quantum model explains much more facts than any previous one, specially about the behaviour of the subatomic particles.