jádro

Jádro is a term with multiple meanings in Czech, most commonly referring to the nucleus of an atom. In physics, the atomic nucleus is the central part of an atom, composed of protons and neutrons. It accounts for almost all of the mass of an atom but occupies a minuscule fraction of its volume. The positive charge of the nucleus, due to the protons, is balanced by the negative charge of electrons orbiting it. Nuclear forces hold the protons and neutrons together within the nucleus.

Beyond its scientific meaning, "jádro" can also refer to the core or heart of something. For example, it can denote the central part of a fruit, like the pit of a peach or apple. In a broader sense, it can signify the essential or most important part of an idea, organization, or process. This figurative usage emphasizes the central, indispensable element. The specific meaning is usually clear from the context in which the word is used.