Question

n: Argon is a:
(A) Ionic compound
(B) Noble gas
(C) Polar covalent compound
(D) Non polar covalent compound
(E) Metallic substance

Answer 1

An ionic compound contains atoms of a metal and a non-metal. Polar covalent compounds contain atoms having different electronegativities. Non- Polar covalent compounds contain atoms having same or similar electronegativity. Metallic substances contain metals. Noble gases contain inert gases.

Complete step-by-step solution: Argon was suspected to be available in air by Henry Cavendish in $1785$ yet wasn't found until $\;1894$ by Lord Rayleigh and Sir William Ramsay.
Argon is the third honourable gas, in period eight, and it makes up about $1\%$of the Earth's climate.
Argon has roughly a similar solvency as oxygen and it is $2.5$occasions as solvent in water as nitrogen. This synthetically latent component is dismal and scentless in the two its fluid and vaporous structures. It isn't found in any mixes.
This gas is confined through fluid air fractionation since the environment contains just $0.94\%$argon. The Martian environment conversely contains $1.6\%$of $Ar - 40$ and five ppm $Ar - 36.$World creation surpasses $750.000{\rm{ }}tons$ every year, the gracefully is for all intents and purposes unlimited.
Atomic number of the argon is $18$
Atomic mass of argon is $39.948gmo{l^{ - 1}}$
Density is $1.78 \times {10^{ - 3}}g/c{m^3}at0^\circ C$
There are six isotopes of argon and electrons shell $\left[ {Ne} \right]3{s^2}3{p^6}$.
So, argon is not so stable in nature and very reactive.

Hence option (b) is the correct answer.

Note: It's one of the latent gases that ordinarily exist as single iotas. Argon alongside helium, neon, xenon, radon, and krypton has a place with the alleged "respectable" gases. Likewise called dormant gases, they have total external electron shells and were accepted not to respond with different components or mixes.