A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with two neutrons, depending on the isotope, held together by the strong force.

2022年3月31日 · We’ll use a Bohr diagram to visually represent where the electrons are around the nucleus of the He atom. Electrons are placed in energy levels in a predictable pattern. The first energy level...

Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of helium-4 (atomic number: 2), the most common isotope of the element helium.

Here we see a schematic diagram of a helium atom in its lowest energy state. Two protons are present in the nucleus of all helium atoms. In the most common variety of helium, the nucleus also contains two neutrons, which have nearly the same mass as the proton but carry no charge.

Helium (from Greek: ἥλιος, romanized: helios, lit. 'sun') is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table.

Learn how to draw the Lewis dot diagram of helium and understand its electron configuration. Find out why helium is a stable and inert element.

2007年7月3日 · Helium is the second most abundant element, comprising roughly one quarter of the mass of the Universe. This animation zooms into a standard helium atom, showing its protons (green), neutrons (white), and electrons (blue).

Diagram showing the nuclear composition and electron configuration of an atom of helium-4 (atomic number: 2), the most common isotope of the element helium. The nucleus consists of 2 protons (red) and 2 neutrons (blue).

2025年1月16日 · The orbital diagram of helium is a graphical representation of the electron configuration of a helium atom. This diagram shows how the electrons in the helium atom are arranged in different orbitals and indicates the spin of electrons.

Diagram of a helium atom. There are only two electrons orbiting helium's nucleus. Helium ballons are lighter than air. From the Greek word helios, the sun. Janssen obtained the first evidence of helium during the solar eclipse of 1868 when he detected a new line in the solar spectrum.