Argon

Krypton, calcium, chlorine+1 are isoelectronic with argon because they all have the same number of electrons, 18.

purple

Argon was first discovered in 1894 by Lord Rayleigh and Sir William Ramsay. It is extracted as a byproduct during the production of liquid oxygen and nitrogen. Argon does not need to be refined before it is used because it is already a pure element in its natural state.

The mass number of an atom of argon is 40. This number represents the total number of protons and neutrons in the nucleus of the argon atom.

number of protons, which determines its atomic number and chemical properties.

Argon is a noble gas with the atomic number 18 and symbol Ar. It is colorless, odorless, and non-reactive under normal conditions, making it an inert gas. Argon is commonly used in gas-filled incandescent and fluorescent light bulbs due to its lack of reactivity.

it was isolated by two british scientist Lord Rayleigh and Sir William Ramsay

Argon was discovered by English scientists Lord Rayleigh and Sir William Ramsay in 1894. They isolated it by fractionally distilling liquefied air.

Argon is an inert gas, and is often used as the fill gas between panes of glass in modern insulated window units.

It is also used extensively as a shielding gas in welding operations.

Argon is an inert gas. It is non-toxic and can only present a problem if it displaces air (or the oxygen in air). This may lead to suffocation. As long as there is "enough" oxygen in the air you breathe, any argon you breathe won't affect you.

18 when neutrally charged.
18 protons, 22 neutrons and 18 electrons. See the periodic table of elements, e.g. in: http://en.wikipedia.org/wiki/Periodic_table#Methods_for_displaying_the_periodic_table

At about 1% of Earth's atmosphere, argon is the 3rd-most plentiful of the atmosphere's elements.

A light bulb glows because of a very fine wire inside the glass bulb called a 'filament'. When an electrical current is put through the filament, assuming the voltage is high enough, it will begin to heat up and glow because such a small wire cannot handle the flow of electrons and has to discharge them through heat and light. Also if you put to much voltage in it will heat up the filament too much and melt it. Incandescent (filament) light bulbs fail over time because they slowly lose small amounts of wire until the filament breaks and stops glowing.

-A bright idea

-neon's boring brother

-has the brawn to get the job done

-Argon to lazy to react with anything

-get gassed by argon, its noble

-its the noblest of all gases

Ar 40 is the most common isotope, accounting for 99.6% of the total (by weight).

Argon has 18 protons, 18 electrons. The most stable isotope of argon (Ar-40) has 22 neutrons.

Argon is a gas in it's natural state. So, no, it would not make a good conductor of heat or electricity. In fact, it would be an excellent insulator because it is an inert gas. For this reason, it is used to fill incandescent light bulbs.

it is 6. because the electron configuration of argon is

1s2 2s2 2p6 3s2 3p6. the highest energy level is 3p6 so there are six.

Argon is a noble gas. It has a full valence shell and thus, 8 electrons.

If you are asking whether nitrogen is less dense than air and will float on top of it, then yes, nitrogen is "lighter," albeit only slightly. More accurately, nitrogen, which is a constituent gas of air, is less dense than air, not lighter. The density of air at standard temperature and pressure is 1.292 kg/m3. The density of nitrogen is 1.251 kg/m3.

It is in Group O or Group 8. Also known as noble gas, they do not react with other elements as they do not have to react to get a stable configuration.

no unpaired electrons in argon because argon is part of noble gases and noble gases are elements that unreactve under normal conditions they are inert as individual atom and do not form any compounds at all

_clariSse

The symbol "Ar" with 8 dots around it.

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: Ar :

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