It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. In a neutral atom there are as many electrons as protons moving about nucleus. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10 -19 coulombs. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The nucleus is composed of protons and neutrons. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure.
Helium electron configuration manual#
Chem 32 Virtual Manual Structure and Bonding Solutions: #6Ħ.* (1996 1 1) The electronic ground-state configuration of the hydrogen atom is one electron in the 1s orbital, denoted by H(1s).