atomic number, the number of achemical elementin the periodic system and on theperiodic tablethat equals the number of protons in the nucleus of the atom. The elements are arranged on the table in order of increasing number of protons in thenucleus. Accordingly, the number ofprotons, which i...
atomic number noun atomic num·ber -ˈnəm-bər : an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of...
the number of protons equals the number of electrons. therefore, the number of protons will be 12. (c) the atomic number equals the number of protons, which is 12. (d) a metal. this is due to the fact that metallic elements have valence electrons less than 3. (e) the element’s ...
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All atoms except the common form of hydrogen contain protons, neutrons and electrons. The atomic number of an element is equal to the number of protons in its nucleus. In a neutral atom, the number of protons equals the number of electrons in shells which is the energy level around the ...
2、rotons and neutrons make up the small, dense nucleus.the electrons surround the nucleus and occupy most of the volume of the atom. the atomic number is the number of protons an atom has. it never changes. in neutral atoms the number of protons equals the number of electrons.atom size...
Atomsarecomposedofelectrons,protons,andneutrons.Theprotonsandneutronsmakeupthesmall,densenucleus.Theelectronssurroundthenucleusandoccupymostofthevolumeoftheatom.TheAtomicNumberisthenumberofprotonsanatomhas.Itneverchanges.Inneutralatomsthenumberofprotonsequalsthenumberofelectrons.Atomsize (copythisslide)...
atomic number是什么意思 n. 原子序数(指元素在周期表中按次序排列的序号); atomic number英英释义 noun an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus...
atomic number, the number of achemical elementin the periodic system and on theperiodic tablethat equals the number of protons in the nucleus of the atom. The elements are arranged on the table in order of increasing number of protons in the nucleus. Accordingly, the number ofprotons, which...
The protons and neutrons make up the small, dense nucleus. The electrons surround the nucleus and occupy most of the volume of the atom. The Atomic Number is the number of protons an atom has. It never changes. In neutral atoms the number of protons equals the number of electrons. Atom ...