Atomic Number Of Neon

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Chemical properties of neon - Health effects of neon - Environmental effects of neon

Number

Atomic number

10

Atomic mass

20.179 g.mol -1

Electronegativity according to Pauling

unknown

Density

0.9*10 -3 g.cm-3 at 20°C

Melting point

-249 °C

Boiling point

-246 °C

Vanderwaals radius

0.16 nm

Ionic radius

unknown

Isotopes

3

Electronic shell

[ He ] 2s22p6

Energy of first ionisation

2080 kJ.mol -1

Energy o second ionisation

3952 kJ.mol -1

Standard potential

6122 kJ.mol -1

Discovered by

Sir Ramsay in 1898

Neon

Atomic Number of Neon Atomic Number of Neon is 10. Chemical symbol for Neon is Ne. Number of protons in Neon is 10. Atomic weight of Neon is 20.1797 u or g/mol. Melting point of Neon is -248,7 °C and its the boiling point is -246,1 °C. Atomic Number: 10: Atomic Radius: 154 pm (Van der Waals) Atomic Symbol: Ne: Melting Point:-258.59 °C: Atomic Weight: 20.18: Boiling Point:-246.046 °C: Electron Configuration: He2s 2 2p 6. Neon is a very inert element, however, it has been reported to form a compound with fluorine. It is still questionable if true compounds of neon exist.

Atomic Number Of Neon

Overview of Neon; Neon's Name in Other Languages; Atomic Structure of Neon; Chemical Properties of Neon; Physical Properties of Neon; Regulatory / Health; Who/When/Where/How. Nuclides / Isotopes; Potential Parent Nuclides. Overview of Neon. Atomic Number: 10; Group: 18; Period: 2; Series: Noble Gasses.

Neon

Neon was discovered by William Ramsay and Morris Travers in 1898.

Neon is the second-lightest noble gas, its colour is reddish-orange in a vacuum discharge tube and in neon lamps. The the refrigerating capacity of helium is over 40 times the one of liquid helium and three times that of liquid hydrogen (on a per unit volume basis). It is a less expensive refrigerant than helium in most applications.

Even though neon is for most practical purposes an inert element, it can form an exotic compound with fluorine in the laboratory. It is not known for certain if this or any neon compound exists naturally but some evidence suggests that this may be true. The ions, Ne+, (NeAr)+, (NeH)+, and (HeNe+) are have also been observed from optical and mass spectrometric research. In addition, neon forms an unstable hydrate.

Applications

The reddish-orange color emitted in neon lights is widely used to make advertising signs. Neon is also used generically for these types of lights when in reality many other gases are used to produce different colors of light. Other uses of neon include high-voltage indicators, lightning arrestors, wave meter tubes and television tubes. Neon and helium are used to make a type of gas laser.

Liquefied neon is commercially used as an economical cryogenic refrigerant.

Neon in the environment

Although neon is the forth most abundant element in the universe, only 0.0018% in volume of the earth's atmosphere is neon.

Neon is usually found in the form of a gas with molecules consisting of a single Neon atom. Neon is a rare gas that is found in the Earth's atmosphere at 1 part in 65,000.

Routes of exposure: The substance can be absorbed into the body by inhalation.

Inhalation risk:On loss of containment this liquid evaporates very quickly causing supersaturation of the air with serious risk of suffocation when in confined areas.

Effects of exposure: Inhalation: Simple asphyxiant. Skin: On contact with liquid: frostbite. Eyes: On contact with liquid: frostbite.

Inhalation: This gas is inert and is classified as a simple asphyxiant. Inhalation in excessive concentrations can result in dizziness, nausea, vomiting, loss of consciousness, and death. Death may result from errors in judgment, confusion, or loss of consciousness which prevent self-rescue. At low oxygen concentrations, unconsciousness and death may occur in seconds without warning.

The effect of simple asphyxiant gases is proportional to the extent to which they diminish the amount (partial pressure) of oxygen in the air that is breathed. The oxygen may be diminished to 75% of it's normal percentage in air before appreciable symptoms develop. This in turn requires the presence of a simple asphyxiant in a concentration of 33% in the mixture of air and gas. When the simple asphyxiant reaches a concentration of 50%, marked symptoms can be produced. A concentration of 75% is fatal in a matter of minutes.

Symptoms: The first symptoms produced by a simple asphyxiant are rapid respirations and air hunger. Mental alertness is diminished and muscular coordination is impaired. Later judgment becomes faulty and all sensations are depressed. Emotional instability often results and fatigue occurs rapidly. As the asphyxia progresses, there may be nausea and vomiting, prostration and loss of consciousness, and finally convulsions, deep coma and death.

Environmental effects of neon

Neon is a rare atmospheric gas and as such is non-toxic and chemically inert. Neon poses no threat to the environment, and can have no impact at all because it's chemically unreactive and forms no compounds.

No known ecological damage caused by this element.


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More from 'Elements'

  1. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. The chemical symbol for Neon is Ne. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. The nucleus is composed of protons and neutrons.
  2. It is important to know that Neon is a chemical element with symbol Ne. Its atomic number is 10. Keep in mind that Neon is in group 18 (noble gases) of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.
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Atomic Number Of Neon 21


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The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. (Atomic mass is also referred to as atomic weight, but the term 'mass' is more accurate.)

Atomic Number Of Neon

For instance, it can be determined experimentally that neon consists of three isotopes: neon-20 (with 10 protons and 10 neutrons in its nucleus) with a mass of 19.992 amu and an abundance of 90.48%, neon-21 (with 10 protons and 11 neutrons) with a mass of 20.994 amu and an abundance of 0.27%, and neon-22 (with 10 protons and 12 neutrons) with a mass of 21.991 amu and an abundance of 9.25%. The average atomic mass of neon is thus:

0.9048×19.992 amu=18.09 amu
0.0027×20.994 amu= 0.057 amu
0.0925×21.991 amu= 2.03 amu
20.18 amu

The atomic mass is useful in chemistry when it is paired with the mole concept: the atomic mass of an element, measured in amu, is the same as the mass in grams of one mole of an element. Thus, since the atomic mass of iron is 55.847 amu, one mole of iron atoms would weigh 55.847 grams. The same concept can be extended to ionic compounds and molecules. One formula unit of sodium chloride (NaCl) would weigh 58.44 amu (22.98977 amu for Na + 35.453 amu for Cl), so a mole of sodium chloride would weigh 58.44 grams. One molecule of water (H2O) would weigh 18.02 amu (2×1.00797 amu for H + 15.9994 amu for O), and a mole of water molecules would weigh 18.02 grams.

Atomic Number Of Neon Is 10

The original periodic table of the elements published by Dimitri Mendeleev in 1869 arranged the elements that were known at the time in order of increasing atomic weight, since this was prior to the discovery of the nucleus and the interior structure of the atom. The modern periodic table is arranged in order of increasing atomic number instead.