Respuesta :
An ion that has two more electrons outside the nucleus than there are protons in the nucleus will have a -2 charge.
An atom or molecule with a net electrical charge is known as an ion. Conventionally, the charge of an electron is thought to be negative this charge is equal to and opposite to the charge of a proton, which is thought to be positive. These ions allow electrical messages to move freely throughout the body. Electrolytes are essential to the body because they control osmotic pressure in cells and support the health of muscle and nerve cells.
Protons dominate electrons in a positively charged ion or cation. The atomic number of the element is represented by the proton number, while the electron number is the atomic number less the charge. An anion or ion with a negative charge has more electrons than protons. The atomic number is once more equal to the number of protons.
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