Noble Gases

There are six naturally occurring noble gases. They are all colorless, odorless, and monatomic.

9,311 Questions
Noble Gases

What are the properties of noble gases?

Noble gases are the quiet ones, they are the least reactive on the periodic table. Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2 valence electrons). Helium and neon have filled valence shells. The noble gases have high ionization energies and stable electronic configuration, so they have little tendency to gain or lose electrons. Hence they are chemically inert and generally do not form compounds under normal conditions. The noble gases have low boiling points and are all monatomic gases at room temperature.

Noble Gases

How are gases unique?

Gases can be compressed with little force used. Solids and liquids are virtually incompressible. If you were to set up an apparatus that allowed you to increase the pressure inside a vessel, it would be noted that the volume of the liquid and the solid would change very little, but the volume of the gas would decrease. This is due to the intermolecular forces between the individual molecules.

Noble Gases

Can helium and oxygen form an ionic compound?

Helium is the most inert of all elements, and it does not form any compounds at all, under any circumstances.

Noble Gases

Is helium gas an element compound or mixture?

Helium is an element.

Noble Gases

What is the noble gas electron configuration of Na2 plus?

Sodium in all its compounds forms the Na+ ion.

Its electron configuration is the same as of noble gas Ne:

(Na+) = (1s2, 2s2 2p6, 3s0)

Na2+ would have the following electron configuration: 1s2, 2s2 2p5

This is not a noble gas configuration and requires a lot of energy to remove the 2nd electron out off the 2px orbital just after the 1st removal from its 3s orbital. It only is observed for example as a transient species when sodium vapour is irradiated with strong laser light.

Noble Gases

How are metal's non-metal's metalloids and noble gases arranged in the periodic table?

Actually every element is arranged by atomic number and which electron shell is their outermost one.

most often, the columns in the table share certain characteristics, so the metals, non-metals, and Noble gases (also non-metals) arrange pretty much by column, with columns 1-12 being metals, 13-16 split between metalloids and non-metals, 17 being non-metal only, and 18 being Noble gases.

Noble Gases

Why do the boiling point of noble gases vary?

Mainly due to their mass. For example, Helium is lighter than Krypton and thus Helium has a lower boiling point (i.e. it is harder to liquify).

Noble Gases

How many bonds does helium usually form?

None. No compounds of Helium are known. However under some circumstances in glow dischagre tubes unstable molecualr compounds can be created- these are called "excimers".

This is why it can be used in hot air balloons, as it can be heated to extreme temperatures, and used for buoyancy, but will not react and cause an explosion, as hydrogen would.

Noble Gases

Is nuclear symbol for helium the same symbol for a proton?

No the hydrogen nucleus is a proton.

The helium nucleus is an alpha particle.

Noble Gases

Is argon a noble gas core or a pseudo gas core?

Argon is a noble gas.

It has the electronic configuration

1s2, 2s2, 2p6, 3s2, 3p6

It has got a noble gas core . (A pseodo noble gas core has a (n-1) d10 electrons in level below the below the ns2, np6 )

Noble Gases

A helium atom has?

an atomic number of 2 and an atomic weight of about 4. So it has 2 protons, 2 neutrons, and 2 electrons. It has a complete valence shell (the smallest atom with this attribute) which makes it the smallest noble gas. It has a cas# of 7440-59-7... I'm not sure what you're asking. I can go on but it would be better if you'd ask a more specific question. You can email me too.

Noble Gases

What happens if you mix helium and carbon dioxide?

Nothing. Helium and CO2 are non reactive with each other. Helium is a noble gas and not reactive at all. This mixture is used as a welding shield to minimize slag, and if oxygen is also included it is used as a deep diving air mix.

Noble Gases

What do all noble gases have in common?

They are not very reactive and they do not form bonds with each other, so molecules of noble gases cannot be formed, there are only atoms, i.e. they are monatomic gases..

Up until 1962 no noble gas compounds were known however compounds of Argon, Krypton Xenon and Radon all form unstable compounds with fluorine.

Noble Gases

What is the most important chemical property of the noble gases?

Noble gases are not reactive. It was long believed that they could not form compounds. However since 1962 compounds of Ar, Kr, Xe and radon have been prepared. These are not stable.

Noble Gases

How elements from helium to iron are created?

The accepted modern theory of elemental formation states:

The lighter elements are a bi-product of nuclear fusion from stellar masses (stars).

Noble Gases

Why are noble gases the least reactive element?

Because the outer electron shell is full as is the case with helium and neon or because it has the stable octet configuration, with 8 electrons, which is true for the rest, argon, krypton, xenon and radon.

Noble Gases

What space will the helium balloon occupy if it bursts in a closed room?

The whole room will fill up

Noble Gases

What are the toxicity of helium?

It is a colorless, odorless, tasteless, nontoxic, and nearly inert gas that heads the noble gas series in the periodic table

Noble Gases

What orbitals are filled in noble gases?

He has the 1s orbital filled, which completes the first level. The rest of the noble gases have an outer shell with an octet of s2, p6 electrons.

The actual electronic configurations are

  • Ne 1s2, 2s2, 2p6 completely filled levels 1 and 2
  • Ar 1s2, 2s2, 2p6 3s2, 3p6 1 and 2 filled - but 3d orbitals empty
  • Kr 1s2, 2s2, 2p6,3s2,3p6, 3d10 4s2 4p6 1, 2 & 3 filled 4d and 4f orbitals empty
  • Xe 1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p6, 4d10, 5s2, 5p6 1 , 2, 3 filled 4f empty and 5d, 5f 5g empty
  • Rn 1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p6, 4d10 4f14, 5s2, 5p6, 5d10, 6s2, 6p6 1 , 2, 3, 4 filled 5f and 5g empty 6d, 6f, 6g, 6h empty

The pattern is that the shell immediately below the outer octet is either full as in Ne, Ar, Kr or has 18 electrons s2, p6, d10 as in Xe and Rn

Noble Gases

What is the noble gas notation of thorium?

The electron configuration of thorium is [Rn]6d27s2.

Noble Gases

What is the noble gas configuration of Ti?

It is [Ar] 4s2 3d2

Noble Gases

What is the electron configuration using noble gas notation of uranium?

The electron configuration of uranium is (short): [Rn]5f36d17s2.

Noble Gases

How much weight will a helium balloon carry?

That depends on the size of the balloon.

Noble Gases

What is the second ionization energy for helium?

5250 kj/mol

Noble Gases

What does helium mean?

Helium is an element, featuring on the Periodic Table of the elements. Helium was first discovered in the sun spectroscopically. It get its name from the Greek word, Helios, meaning "the sun".


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