What is an electron shell?
A - A hard container holding electrons close to the nucleus
B - The space around the nucleus where the electrons are most likely to be found
C - The exact location of an electron
D - The electron's protective outer layer
Answer: B - The space around the nucleus where the electrons are most likely to be found
You can never know for certain where the electrons are because they are moving around, so with every snapshot you take of the atom the electrons might be in a different place. Also called electron clouds or energy levels