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atomic number |
Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Acronyms, Encyclopedia, Wikipedia | 0.01 sec. |
atomic numberNumber of protons in the nucleus of an atom. It is equal to the positive charge on the nucleus. In a neutral atom, it is also equal to the number of electrons surrounding the nucleus. The chemical elements are arranged in the periodic table of the elements according to their atomic number. Nuclear notation is used to label an atom according to the composition of its nucleus. |
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| 9898), atomic number (11), and specific gravity (0. According to Casey Lisse of the Deep Impact team, copper was chosen because its density put a lot of mass into a small package, its relative softness reduced bounce at impact, and its large atomic number and density contrast with those of elements that were expected to spew from the comet at impact (see p. The atomic number and weight are listed for each element, as well as the naturally occurring isotopes and their isotopic mass, abundance, nuclear spin, and magnetic moment. |
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atomic number
