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Alkyl Group , An alkyl group is a paraffinic hydrocarbon group that may be derived from an alkane by dropping one hydrogen from the structure. Such groups are ofte… Atom , atom •hansom, ransom, Ransome, transom •Wrexham • sensum • Epsom • jetsam •lissom • winsome • gypsum • alyssum •blossom, opossum, possum •flotsam • a… Atomic , a·tom·ic / əˈtämik/ • adj. of or relating to an atom or atoms: the atomic nucleus. ∎ Chem. (of a substance) consisting of uncombined atoms rather tha… peroxide , peroxide •backside, trackside •bedside • airside •Tayside, wayside •lakeside • stateside • graveside •quayside, seaside, Teesside •beachside • hillsi… Atomic Clock , Atomic clocks are the world's most accurate time keepers—more accurate than astronomical time or quartz clocks. Originally, a second was defined as 1… Atoms , Atom
Ordinary physical and chemical matter is made of atoms. An atom is defined by its atomic number Z : A neutral atom has Z electrons, whose negati…
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