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The atomic nucleus doesn't contain electrons.
2 electrons are held closest to the nucleus, after that the maximum per shell is eight.
Yes, though interestingly the probability density for finding an s orbital electron is actually higher in the nucleus than anywhere else (this assumes the nucleus and electron are point masses; in reality, they aren't, so it doesn't quite work out that way in the real world).
Atoms are composed of 3 main subatomic particles, or "parts". In the nucleus, or center, protons and neutrons are held, and in the outside, there are shells that contain electrons. Electrons do not actually produce electricity- they carry it from one place to another. When electrons move, they are electricity.
Electrons are held in place by the electromagnetic force exerted between them and the positively charged protons in an atom's nucleus. This force keeps electrons in orbit around the nucleus, preventing them from flying off into space.
electrostatic force between the nucleus and the electrons.
A covalent bond is held together by the attractions between the protons in the nucleus and shared electrons.
Electrons do not crash into the nucleus because they are constantly in motion and are held in orbit around the nucleus by the electromagnetic force. This force keeps the electrons at a certain distance from the nucleus, preventing them from colliding with it.
Between electrons and the atomic nucleus a repulsion exist.
Electrons are held within the atom by the attraction between their negative charge and the positive charge of the nucleus. This attraction, known as the electromagnetic force, keeps the electrons in orbit around the nucleus in specific energy levels.
They aren't held IN atoms. They are held AROUND atoms. Yet, the answer you seek is still simple. The Protons of any given atom contain a positive charge value of +1. Each Electron carries a negative charge of -1. These opposites attract, and that's why the Electrons stay in place.
Core electrons are the inner electrons of an atom that are tightly held by the nucleus and are not involved in chemical reactions. These electrons are typically found in filled electron shells closer to the nucleus.