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Metallic bonding is the force of attraction between valence electrons and the metal ions.

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a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

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A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms.

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the symmetrical three-dimensional arrangement of atoms inside a crystal.

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an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

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Ionic bonding is the complete transfer of valence electron(s) between atoms.

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In chemistry, a valence electron is an electron that is associated with an atom, and that can participate in the formation of a chemical bond

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physical restraints used to hold someone or something prisoner, especially ropes or chains.

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A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds.

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a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

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any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.

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the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

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the total number of protons and neutrons in a nucleus.

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each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

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the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

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Protons and neutrons, each with mass approximately one atomic mass unit, constitute the nucleus of an atom, and they are collectively referred to as nucleons.

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a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12.

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Protons and neutrons, each with masses of approximately one atomic mass unit, are collectively referred to as "nucleons

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Electron cloud is an informal term in physics. It is used to describe where electrons are when they go around the nucleus of an atom.

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the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.

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a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids

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the basic unit of a chemical element.