Elektronszáma

Elektronszáma, also known as atomic number, is a fundamental property of an element that is defined as the number of protons found in the nucleus of an atom of that element. It is denoted by the symbol Z and is unique to each chemical element. The elektronszáma determines the element's identity and its position in the periodic table. For example, hydrogen has an elektronszáma of 1, while helium has an elektronszáma of 2.

The elektronszáma also influences the chemical properties of an element. Elements with the same elektronszáma but different numbers of neutrons are called isotopes. The elektronszáma is crucial in nuclear reactions and in the understanding of the periodic trends observed in the properties of elements.

In the context of the periodic table, the elektronszáma increases from left to right across a period and from top to bottom down a group. This arrangement reflects the increasing number of protons and electrons in the atoms of the elements. The elektronszáma is a key concept in chemistry and physics, providing a basis for understanding the behavior of matter at the atomic and subatomic levels.