What is the definition of bond (in chemistry) ?

Bond is a force that binds two atoms together.

A bond is a link between atoms in molecules or compounds and between ions and molecules in crystals. A bond represents a lasting attraction between different atoms, molecules or ions.

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sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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"the periodic table is arranged in order of atomic number."