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In chemistry, a nucleus is the positively charged center of the atom consisting of protons and neutrons. It's also known as the "atomic nucleus". The word "nucleus" comes from the Latin word nucleus, which is a form of the word nux, which means nut or kernel. The term was coined in 1844 by Michael Faraday to describe the center of an atom.
The atomic nucleus is the tiny, dense core of an atom that contains protons and neutrons held together by the strong force. Collectively, the protons and neutrons in the nucleus are called nucleons. The number of protons in the atomic nucleus identifies the element of an atom.
The nucleus (plural, nuclei) is defined as the dense, central part of an atom, consisting of two subatomic particles, namely protons and neutrons. A nucleus accounts for more than 99.9% of an atom’s mass but is 100,000 times smaller than it in size.
Almost all of the mass of an atom is contained within a tiny (and therefore extremely dense) nucleus which carries a positive electric charge whose value identifies each element and is known as the atomic number of the element.
The nucleus consists of subatomic particles called neutrons, which are electrically neutral, and protons, which are positively charged. Because an atom is neutral overall, the number of positive protons in the nucleus and the number of negative electrons surrounding the nucleus are the same.
In Chemistry, a nucleus is a fundamental arrangement of atoms that occur in compounds through the substitution of atoms without a change in structure. In Astronomy, a nucleus is the center of the head of a comet or the central or brightest part of a nebula or galaxy.
The nucleus (plural, nuclei) is a positively charged region at the center of the atom. It consists of two types of subatomic particles packed tightly together. The particles are protons, which have a positive electric charge, and neutrons, which are neutral in electric charge.
Definition of Nucleus. What is a Nucleus? The nucleus (plural nuclei) is the central part of the atom; it contains the protons and neutrons. Mass, Volume and Density. Nearly all of the atom's mass is contained in the nucleus; the volume of the nucleus is tiny compared with the atom's total volume; thus the density of matter in the nucleus is ...
Every atom contains a very small, dense, central core called the nucleus. Apart from hydrogen, the nucleus of every other atom is made up of particles called protons and neutrons. The nucleus is surrounded by mostly empty space, except for very tiny particles called electrons that orbit the nucleus.
The nucleus of a cell, an organelle found in almost all eukaryotic organisms, is the command and control center of the cell. The nucleus stores the organism's genetic material and communicates commands concerning general cell behavior to the rest of the cell using molecular messengers.