atomtömegei

Atomtömegei, meaning "atomic masses" in Hungarian, refers to the mass of an atom. This mass is primarily determined by the number of protons and neutrons within the atom's nucleus, collectively known as nucleons. Electrons also contribute to the atom's mass, but their contribution is significantly smaller due to their much lower mass compared to protons and neutrons.

The atomic mass unit (amu) is a standard unit used to express the mass of atoms and molecules. One amu is defined as one-twelfth of the mass of an unbound neutral atom of carbon-12 in its ground state. This unit provides a convenient way to compare the relative masses of different atoms. The atomic mass of an element listed in the periodic table is typically its average atomic mass, which is a weighted average of the masses of its naturally occurring isotopes. Isotopes of an element have the same number of protons but different numbers of neutrons, leading to different atomic masses.

The concept of atomic mass is fundamental to chemistry and physics. It plays a crucial role in stoichiometry, the calculation of the relative amounts of reactants and products in chemical reactions. Understanding atomic masses also helps in comprehending nuclear physics, including nuclear reactions and radioactive decay. Precise measurements of atomic masses have led to significant advancements in our understanding of the fundamental forces and particles that make up matter.