H2molekyylissä

H2molekyylissä refers to the chemical compound hydrogen represented as H2. It is the simplest molecule, consisting of two hydrogen atoms bonded together. Each hydrogen atom has one proton and one electron. In the H2 molecule, these two atoms share their electrons to form a stable covalent bond. This sharing allows both hydrogen atoms to achieve a stable electron configuration. The molecular formula H2 indicates that a molecule of hydrogen contains two atoms of hydrogen. Hydrogen gas, which is composed of H2 molecules, is the most abundant chemical substance in the universe, making up about 75% of all baryonic mass.

The H2 molecule is nonpolar due to the equal sharing of electrons between the two identical hydrogen atoms. This nonpolar nature influences its physical properties, such as its low boiling and melting points. Hydrogen gas is highly flammable and reacts with oxygen to produce water. In its pure form, H2 is colorless, odorless, and tasteless. It exists as a diatomic molecule under standard conditions of temperature and pressure. The bond dissociation energy of the H2 molecule is quite high, indicating a strong covalent bond.