atomic number

(Z) The number of protons in an atomic nucleus. The atomic number and the element symbol are two alternate ways to label an element. In nuclide symbols, the atomic number is a leading subscript; for example, in 126C, the '6' is the atomic number.
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Atomic number

In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an ...
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atomic number

The number of protons in an atom
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atomic number

The number of protons in the nucleus of a given atom. Elements are distinguished from each other by their atomic numbers.
Found on http://www.encyclo.co.uk/local/22291

Atomic number

the total number of protons in the nucleus of an atom.
Found on http://www.encyclo.co.uk/local/21808

Atomic Number

(symbolized Z) (R Numar Atomic)The number of protons in a nucleus. It determines the chemical properties of an element
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atomic number

(Z) a number expressive of the number of protons in an atomic nucleus, or the positive charge of the nucleus expressed in terms of the electronic charge.
Found on http://www.encyclo.co.uk/local/21001

atomic number

[n] - the order of an element in Mendeleyev`s table of the elements
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atomic number

<chemistry> Symbol Z. The number of protons in the nucleus of an atom and also its characteristic atomic number. The atomic numbers of the known elements form a complete series from 1 (hydrogen) to 103 (lawrencium). ... (16 Dec 1997) ...
Found on http://www.encyclo.co.uk/local/20973

atomic number

noun 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
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atomic number

(Z) Type: Term Definitions: 1. the number of protons in the nucleus of an atom; it indicates the position of the element in the periodic system.
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atomic number

Atomic number (Z) is a characteristic property of an element, equal to the number of protons in the nucleus.
Found on http://www.ktf-split.hr/periodni/en/abc/a.html

atomic number

atomic number, often represented by the symbol Z, the number of protons in the nucleus of an atom, as well as the number of electrons in the neutral atom. Atoms with the same atomic number make up a chemical element. Atomic numbers were first assigned to the elements c.1913 by H. G. J. Moseley; he a...
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Atomic Number

In chemistry, an atomic number is a number, characteristic of an atom, that represents the number of protons in the nucleus of the atom. It indicates the location of an element in the periodic table.
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Atomic Number

Integral number of protons in the nucleus, defines the identity of element.
Found on http://www.encyclo.co.uk/local/20728

Atomic Number

Integral number of protons in the nucleus; defines the identity of element.
Found on http://www.chemistry-dictionary.com/definition/atomic+number.php

Atomic Number

is the number of protons in the nucleus of an atom. It is the whole number on the periodic chart. It is also the number of electrons in a neutral atom (where protons = electrons).
Found on http://www.chemicalglossary.net/definition/120-ATOMIC_NUMBER

atomic number

Number of protons in an element.
Found on http://www.shodor.org/UNChem/glossary.html

Atomic Number

Number of protons in an element.
Found on http://www.chemicalglossary.net/definition/184-Atomic_Number

Atomic Number

Number of protons in the nucleus of an atom.
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atomic number

Number 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 ...
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atomic number

order of an element in the periodic chemical classification, identified with the number of protons in the atomic nucleus NOTE - Z = A - N where A is the mass number and N the number of neutrons in the atomic nucleus.
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Atomic Number

Specific to individual elements
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Atomic Number

The atomic number (Z) of an element is the number of protons each atom of that element has in its nucleus; e.g., Z = 17 for chlorine (17Cl).The atomic number was originally defined as an index describing the position of an element in the periodic table and it was not until 1913 that it was known that it was a unit of measurement. Click o...
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atomic number

The atomic number was originally defined (about 1865) simply as an index describing the position of an element in the periodic table. Not until 1913 was it known that the atomic number is actually a unit of measurement, equal to the number of electrons surrounding a neutral (uncharged) atom, and also to the number of protons in the nucleus.
Found on http://www.unc.edu/~rowlett/units/dictA.html
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