Question

how did quantum mechanics change our understanding of atoms?


A. in quantum mechanics, electrons exist in a cloud-shaped area outside the nucleus.


B. in quantum mechanics, photons exist in a cloud-shaped area outside the nucleus.


C. in quantum mechanics, photons are a part of the nucleus along with electrons.


D. in quantum mechanics, photons are a part of the nucleus along with protons.

Answer 1

A. in quantum mechanics, electrons exist in a cloud-shaped area outside the nucleus.

Answer 2

Answer:

The correct answer is option A.

Explanation:

Schrodinger proposed the mechanic model of atom in which he defined the location of electrons inside an atom by electron cloud in 3-d space. And in order to locate them he introduced the concept of quantum numbers.

Where as photons are the discrete  packet or bundle of energy related to electromagnetic radiations.