Argon - Protons - Neutrons - Electrons - Electron Configuration (2023)

Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning.

Argon is produced industrially by the fractional distillation of liquid air. a process that separates liquid nitrogen, which boils at 77.3 K, from argon, which boils at 87.3 K, and liquid oxygen, which boils at 90.2 K.

Protons and Neutrons in Argon

Argonis a chemical element with atomic number18 which means there are 18 protons in its nucleus. Total number of protons in the nucleus is called theatomic numberof the atom and is given thesymbol Z. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to1,602 x 10-19coulombs.

The total number ofneutronsin the nucleus of an atom is called theneutronnumberof the atom and is given thesymbol N. Neutronnumber plusatomic numberequals atomic mass number:N+Z=A. The difference between the neutron number and the atomic number is known as theneutron excess: D = N – Z = A – 2Z.

For stable elements, there is usually a variety of stable isotopes. Isotopes are nuclides that have the same atomic number and are therefore the same element, but differ in the number of neutrons. Mass numbers of typical isotopes of Argonare36; 38; 40.

Main Isotopes of Argon

Nearly all of the argon in the Earth’s atmosphere is radiogenic argon-40, derived from the decay of potassium-40 in the Earth’s crust. Argonhas 26 knownisotopes, from29Ar to54Ar and 1isomer(32mAr), of which three arestable(36Ar,38Ar, and40Ar). On the Earth,40Ar makes up 99.6% of natural argon.

Argon-36 is composed of 18 protons, 18 neutrons, and 18 electrons.

Argon-38 is composed of 18 protons, 20 neutrons, and 18 electrons.

Argon-40 is composed of 18 protons, 22 neutrons, and 18 electrons. Almost all of the argon in the Earth’s atmosphere is the product of 40K decay, since 99.6% of Earth atmospheric argon is 40Ar.

Stable Isotopes

IsotopeAbundanceNeutron Number
36Ar0.334%18
38Ar0.063%20
40Ar99.604%22
(Video) How to find the Number of Protons, Electrons, Neutrons for Argon (Ar)

Electrons and Electron Configuration

The number of electrons in an electrically-neutral atom is the same as the number of protons in the nucleus. Therefore, the number of electrons in neutral atom of Argon is 18. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z – 1) negative electrons in the atom.

Since the number of electrons and their arrangement are responsible for the chemical behavior of atoms, theatomic numberidentifies the various chemical elements. The configuration of these electrons follows from the principles of quantum mechanics. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. In the periodic table, the elements are listed in order of increasing atomic number Z.

Electron configuration ofArgonis[Ne] 3s23p6.

Possible oxidation states are0.

(Video) Electron Configuration - Basic introduction

Argon’s complete octet of electrons indicates full s and p subshells. This full valence shell makes argon very stable and extremely resistant to bonding with other elements. Before 1962, argon and the other noble gases were considered to be chemically inert and unable to form compounds; however, compounds of the heavier noble gases have since been synthesized.

Some Compound of Argon

Argon fluorohydride or argon hydrofluoride is an inorganic compound with the chemical formula HArF (also written ArHF).

About Protons

A protonis one of thesubatomic particlesthat make up matter. In the universe, protons are abundant, making upabout halfof all visible matter. It hasa positive electric charge (+1e)and a rest mass equal to 1.67262 × 10−27kg (938.272 MeV/c2)— marginally lighter than that of the neutron but nearly 1836 times greater than that of the electron. The proton has a mean square radius of about 0.87 × 10−15m, or 0.87 fm, and it is a spin – ½ fermion.

The protonsexist in the nuclei of typical atoms, along with their neutral counterparts, the neutrons. Neutrons and protons, commonly callednucleons, are bound together in the atomic nucleus, where they account for 99.9 percent of the atom’s mass. Research in high-energy particle physics in the 20th century revealed that neither the neutron nor the protonis notthe smallest building block of matter.

About Neutrons

A neutronis one of thesubatomic particlesthat make up matter. In the universe, neutrons are abundant, making upmore than halfof all visible matter. It hasno electric chargeand a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1839 times greater than that of the electron. The neutron has a mean square radius of about 0.8×10−15 m, or 0.8 fm, and it is a spin-½ fermion.

Atomic nuclei consist of protons and neutrons, which attract each other throughthe nuclear force, while protons repel each other viathe electric forcedue to their positive charge. These two forces compete, leading to various stability of nuclei. There are only certain combinations of neutrons and protons, which formsstable nuclei.

Neutrons stabilize the nucleus, because they attract each other and protons , which helps offset the electrical repulsion between protons. As a result, as the number of protons increases,an increasing ratio of neutrons to protons is neededto form a stable nucleus. If there are too many or too few neutrons for a given number of protons, the resulting nucleus is not stable and it undergoesradioactive decay.Unstable isotopesdecay through various radioactive decay pathways, most commonly alpha decay, beta decay, or electron capture. Many other rare types of decay, such as spontaneous fission or neutron emission are known. It should be noted that all of these decay pathways may be accompanied bythe subsequent emission ofgamma radiation. Pure alpha or beta decays are very rare.

(Video) Atomic Structure (Bohr Model) for Argon (Ar)

About Electrons and Electron Configuration

The periodic table is a tabular display of the chemical elements organized on the basis of their atomic numbers, electron configurations, and chemical properties. The electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. Knowledge of theelectron configurationof different atoms is useful in understanding the structure of the periodic table of elements.

Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Thechemical properties of the atomare determined by the number of protons, in fact, by number andarrangement of electrons. Theconfiguration of these electronsfollows from the principles of quantum mechanics. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. In the periodic table, the elements are listed in order of increasing atomic number Z.

It is thePauli exclusion principlethat requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. The ordering of the electrons in the ground state of multielectron atoms, starts with the lowest energy state (ground state) and moves progressively from there up the energy scale until each of the atom’s electrons has been assigned a unique set of quantum numbers. This fact has key implications for the building up of the periodic table of elements.

The first two columns on the left side of the periodic table are where thessubshells are being occupied. Because of this, the first two rows of the periodic table are labeled thes block. Similarly, thep blockare the right-most six columns of the periodic table, thed blockis the middle 10 columns of the periodic table, while thef blockis the 14-column section that is normally depicted as detached from the main body of the periodic table. It could be part of the main body, but then the periodic table would be rather long and cumbersome.

For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. The electron configuration can be visualized as the core electrons, equivalent to thenoble gasof the preceding period, and the valence electrons (e.g. [Xe] 6s2 for barium).

Oxidation States

Oxidation states are typically represented by integers which may be positive, zero, or negative. Most elements have more than one possible oxidation state. For example, carbon has nine possible integer oxidation states from −4 to +4.

The current IUPAC Gold Book definition of oxidation state is:

“Oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds…”

and the term oxidation number is nearly synonymous. An element that is not combined with any other different elements has an oxidation state of 0. Oxidation state 0 occurs for all elements – it is simply the element in its elemental form. An atom of an element in a compound will have a positive oxidation state if it has had electrons removed. Similarly, adding electrons results in a negative oxidation state. We have also distinguish between the possible and common oxidation states of every element. For example, silicon has nine possible integer oxidation states from −4 to +4, but only -4, 0 and +4 are common oxidation states.

Summary

ElementArgon
Number of protons18
Number of neutrons (typical isotopes)36; 38; 40
Number of electrons18
Electron configuration[Ne] 3s23p6
Oxidation states0

(Video) Electron Configuration - Argon

Source: www.luciteria.com

Properties of other elements

Argon - Protons - Neutrons - Electrons - Electron Configuration (6)

Periodic Table in 8K resolution

FAQs

How do you write the electron configuration for argon? ›

Therefore the Argon electron configuration will be 1s22s22p63s23p6. Because the third energy level has eight electrons and is therefore full (3s23p6) it is called a noble gas.

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d6? ›

Thus, following the rules on how to fill the orbitals, the electronic configuration of iron (for example) is 1s2 2s2 2p6 3s2 3p6 4s2 3d6 , and it is abbreviated form [Ar] 4s2 3d6.

What is 1s2 2s2 2p6 3s2 electron configuration? ›

The electron configuration 1s22s22p63s23p2 is the element Silicon.

What is the electron configuration of argon 18? ›

Table 5.2 shows the electron configurations of the elements with atomic numbers 1 through 18.
...
ElementAtomic numberElectron configuration
argon181s22s22p63s23p6
17 more rows

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