The atomic nucleus doesn't contain electrons.
2 electrons are held closest to the nucleus, after that the maximum per shell is eight.
electrostatic force between the nucleus and the electrons.
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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.
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.
Electrons held loosely can lead to a material exhibiting good electrical conductivity since they are free to move in response to an applied voltage. This is seen in metals where the valence electrons are not strongly bound to the atomic nucleus.
The electrons closest to the nucleus are held with the most force due to the stronger electrostatic attraction between the positively charged nucleus and negatively charged electrons. These inner electrons have higher energy levels and are less shielded by other electrons, resulting in a stronger force of attraction.
the electrons on the last shell of an atom are called valency electrons.
Electrons shared in a molecule are held closer to the atom with the larger nucleus due to its greater positive charge, which exerts a stronger attractive force on the negatively charged electrons. This results in the electron density being unequally distributed in the molecule, creating a partial negative charge near the atom with the larger nucleus.