The total electric charge in molecules and compounds is generally neutral, meaning that the positive charges from protons in the nucleus balance out the negative charges from electrons surrounding the nucleus. In some cases, molecules or compounds may carry a net charge if they have gained or lost electrons, making them ions.
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The total charge on an electric dipole is zero, as it consists of equal and opposite charges separated by a distance. The dipole moment represents the strength of the dipole, which is the product of the charge and the separation distance between the charges.
The electric charge of a proton is +1, and the electric charge of an electron is -1. Therefore, a particle containing two protons and one electron would have a total charge of +2 + (-1) = +1.
Electric charge is a fundamental property of matter, existing at the atomic level. All atoms possess electric charge due to the presence of protons which are positively charged, electrons which are negatively charged, and neutrons that are neutral.
There are 18 total molecules in 3Be2Br. This is because the subscript numbers indicate how many of each atom are present in the compound. So in 3Be2Br, there are 3 molecules of Be and 6 molecules of Br, for a total of 18 molecules.
The net charge for H2 is 0. This is because each hydrogen atom has a charge of +1, and when two atoms of hydrogen combine to form H2, the total charge remains neutral.