Atomimassaan

Atomimassaan is a Finnish term that translates to "atomic mass" in English. It refers to the mass of an atom, which is primarily determined by the number of protons and neutrons in its nucleus. The mass of electrons also contributes to the atomic mass, but their contribution is significantly smaller due to their much lower mass compared to protons and neutrons. Atomic mass is typically measured in atomic mass units (amu), where one amu is defined as one-twelfth the mass of an unbound neutral atom of carbon-12. This unit provides a convenient way to express the masses of individual atoms and molecules.

The concept of atomic mass is fundamental in chemistry and physics. It is used to calculate molar mass, which is the mass of one mole of a substance. Molar mass is crucial for stoichiometric calculations, allowing chemists to determine the amounts of reactants and products in chemical reactions. Atomic mass also plays a role in understanding isotopes, which are atoms of the same element that have different numbers of neutrons. Isotopes of an element have different atomic masses. The weighted average of the atomic masses of an element's isotopes is known as the atomic weight, which is the value commonly found on the periodic table.