atomic number


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Related to atomic number: Isotopes, atomic weight

atomic number

n. Symbol Z Abbr. at. no.
The number of protons in an atomic nucleus.

atomic number

n
(General Physics) the number of protons in the nucleus of an atom of an element. Abbreviation: at. no. Symbol: Z Also called: proton number

atom′ic num′ber


n.
the number of protons in the nucleus of an atom of a given element, used to locate the element in the periodic table. Abbr.: at. no.; Symbol: Z
[1815–25]

atomic number

The number of protons in the nucleus of an atom. In electrically neutral atoms, this number is also equal to the number of electrons orbiting about the atom's nucleus. The atomic number of an element determines its position in the Periodic Table.

atomic number

1. Or proton number (Z) The number of protons in the nucleus of an atom. If not electrically charged, this is equal to the number of electrons in its shells.
2. The number of protons in the nucleus of an atom.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atomic number - the order of an element in Mendeleyev's table of the elementsatomic number - the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element
number - a concept of quantity involving zero and units; "every number has a unique position in the sequence"
magic number - the atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126
Translations
atomové číslo
原子番号
atoomnummer
atomnummer
原子序

atomic number

n (Chem) → numero atomico
References in periodicals archive ?
An atomic number) Exemplars Dime un grupo quimico (Terreo) Dime un grupo quimico (Anfigeno) Dime un elemento quimico (Polonio) Dime un elemento quimico (Indio) Dime un niimero atomico (El 49) Dime un nomero atomico (El 84) Name a chemical group (The boron[-group]) Name a chemical group (Chalcogen) Name a chemical element (Indium) Name a chemical element (Polonium) Name an atomic number (49) Name an atomic number (84)
This page gives the element's atomic number and make-up plus the density and boiling and melting points.
For the soft tissue experience, the barium sulfate strips matched with atomic number 9 and density of 1.
The 3 Bosons then combined with Electrons to form 5 various geometrical particles we now identified as Higgs Bosons that was discovered by CERN this year and is also confirmed by the Atomic Mass, Atomic Number and Period of each Element in each Block on the Periodic Table.
2 Which chemical element has the atomic number 5 and chemical symbol B?
ATOMIC NUMBER equals the number of protons (positively charged particles) in an atom's nucleus, or center.
The periodic table--one of the most useful tools in chemistry--is a grid of the known elements that are in order from smallest atomic number to largest.
By allowing students to see and create atoms on their own, it is much easier to introduce the periodic table of elements later, because students often struggle with differentiating between atomic number and atomic mass.
25 Ascot Identified by the chemical symbol Ra and an atomic number of 88, Radium is radioactive and almost pure white, but readily oxidises on exposure to air and turns black.
This confirms the scientists' belief that materials with similar effective atomic numbers (an average atomic number for a mixture of components), such as different lettuce varieties, will have similar dose distribution.
The Periodic Table of chemistry is a tabular arrangement of the chemical elements according to atomic number, as based on the Periodic Law which states that certain properties of elements repeat periodically when arranged by periodic number.
The results show that relative spin-orbit interaction effect is insignificant according to Rashba effect for thin layer Pb/Si(III) empirical results contrary to high atomic number of zinc.