Question

Within an atom, electrons

are outside the nucleus and are motionless.
are in motion outside the nucleus.
are inside the nucleus and are motionless.
are in motion inside the nucleus.

Answer 1

Electrons are in constant motion outside the nucleus.

NOTE: You can know where an electron is, or its velocity, but not both at the same time with certainty.

Answer 2

The correct answer is B. Are in motion outside the nucleus

Step-by-step explanation:

An atom (unit of matter) includes protons, electrons, and neutrons. Besides this, in atoms protons and neutrons are located in the nucleus or center, while electrons orbit this nucleus in orbits according to different electron shells. Besides this, electrons differ from other sub-particles because they are negatively charged which causes electrons to influence properties such as electricity or magnetism. According to this, it can be concluded electrons are outside the nucleus and these are in motion.