The variety of electrons or protons current in a neutral atom is referred to as atomic number. It is stood for by Z.

You are watching: The atomic number of an electrically neutral atom is equal to the number of:

What does neutral intend here? Why isn"t it simply "..current in an atom..."?


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Electrons and also protons are charged pwrite-ups. The electrons have actually negative charge, while protons have actually positive charge. A neutral atom is an atom wright here the charges of the electrons and also the proloads balance. Luckily, one electron has the exact same charge (through opposite sign) as a proton.

Example: Carbon has 6 prolots. The neutral Carbon atom has 6 electrons. The atomic number is 6 considering that tbelow are 6 proloads.


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Here, a "neutral atom" is ssuggest an atom that has no charge.

See, an atom consists of protons, neutrons, and electrons. Prolots are positively charged, electrons are negatively charged (through the same magnitude of charge per pshort article as a proton). Neutrons have actually no charge.

Now, in a "neutral atom", the variety of proloads must be equal to the variety of electrons, otherwise it would not be neutral.

Basically, the definition is saying that "in a neutral atom, the atomic number is equal to both the number of proloads , and the variety of electrons, bereason, well, they both are the exact same."

Compare this through an ion

An ion is an atom or molecule in which the full number of electrons is not equal to the complete variety of proloads, giving it a net positive or negative electrical charge

Here, the atomic number cannot be equal to both--bereason they are unequal. In this instance, a much better meaning would certainly be:

The number of protons present in an atom is it"s atomic number. It is represented by $Z$.


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answered Jul 5 "12 at 10:50
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ManishEarthManishEarth
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I entirely agree via George that "neutral atom" is cshed to nonfeeling. Undoubtedly, IUPAC recommends the following definition for atom:

atom

Smallest pwrite-up still characterizing a chemical element. It is composed of a nucleus of a positive charge ($Z$ is the proton number and also $e$ the elementary charge) delivering almost all its mass (even more than 99.9%) and also $Z$ electrons determining its size.

As one deserve to check out, for an atom the proton number, also recognized as atomic number, which is the variety of prolots in the atomic nucleus, is the very same as the variety of electrons. Consequently, any kind of atom is (electrically) neutral by meaning, as George pointed out in his comment.


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edited Apr 13 "17 at 12:57
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answered Jan 28 "15 at 13:13
WildcatWildcat
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Due to the fact that periodically researchers use the term "atom" once it is not neutral.

This is the majority of frequently in the phrase "hydrogen like atoms":

A hydrogen like atom consists of one nucleus of charge Ze and a single electron of charge -e.

See also:

Correlation in Helium-Like Atoms (2-electron atoms regardless of charge)

The Spectra of some Lithium-favor and Sodium-choose Atoms (3 and 11-electron atoms)

Quadruply excited beryllium-prefer atoms – a semiclassical design (4-electron atoms)

Fine-structure research studies of the ground state of boron-choose atoms (5-electron atoms)

Relativistic corrections to the ground state energies of the carbon-prefer atoms (6-electron atoms)

and so on.


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answered May 31 "16 at 16:31
DavePhDDavePhD
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Neutral atom is an atom via no net charge on it favor it is not Na+ yet Na or Cl- but Cl.The perboy has actually not referred to atom yet neutral atom more than likely because charged atoms/ions have additional electron (as Cl-) or lesser number of electrons (favor Na+), violating the concept that atomic number is the variety of protons/ electrons current in a neutral atom.

See more: What Should I Choose For Reveal The Murderer Of The Senior Reader In _______


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answered Feb 8 "16 at 20:49
Tyto albaTyto alba
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