Question

where are electrons of an atom found? some are in the nucleus and some in the electron cloud. electron cloud nucleus they are moving everywhere.

Explanation:

In atomic structure, electrons are located in the electron cloud (also called the orbital) surrounding the nucleus. The nucleus contains protons and neutrons, not electrons. The option "Some are in the nucleus..." is incorrect as electrons aren't in the nucleus. "They are moving everywhere" is too vague; electrons are confined to the electron cloud region. So the correct answer is the option with "Electron Cloud".

Answer:

B. Electron Cloud (assuming the second option is labeled B; if options are just as shown, the correct one is the "Electron Cloud" option)