i have no idea when it was discovered
The electron cloud is the region surrounding an atomic nucleus where electrons are most likely to be found.
The electron cloud contains electrons, which are negatively charged particles that orbit the atomic nucleus. The cloud also contains other subatomic particles such as protons and neutrons in the nucleus, which contribute to the overall structure of an atom.
Electrons are the subatomic particles found in the electron cloud surrounding the nucleus of an atom.
The charge of an electron cloud is negative. The electron cloud is made up of electrons, and the electrons are negatively charged. The electron cloud will have a negative charge as well.
Electrons are found in the electron cloud (or orbitals) around the nucleus of an atom
the orbitals
electron cloud
Electrons are found in the electron cloud that surrounds the nucleus.
Electrons are found outside the nucleus in the electron cloud.
An electron cloud is made of electrons, which are negatively charged subatomic particles that orbit the nucleus of an atom in a probabilistic manner, forming a region of space where an electron is likely to be found.
I think the word you're looking for is "electron cloud". That term already describes where electrons are found. It would be kind of silly to define "electron cloud" in such a way that it describes an area where electrons are not found, wouldn't it?
The space around the nucleus of an atom is called the electron cloud. The electron cloud is the space in which the electrons of that atom travel. Compared to the nucleus, the electron cloud is enormous.