Ar (argon)
Helium is classified as a non-metallic element. It is a gas at room temperature and belongs to group 0 which is called the noble gases. It is very a very stable element and has a low density.
Yes. as all noble gases are mono atomic.
1.783 grams/liter x 22.4 liters/mole = 40 grams/mole = Argon
Because it is a noble gas, all of which are very unreactive.
The density of noble gases varies depending on the specific gas. For example, the density of helium is 0.1785 g/L, while the density of xenon is 5.894 g/L. Overall, noble gases are generally low in density compared to other elements because of their low atomic mass and non-reactive nature.
Noble gases are, for all intents and purposes, unreactive - there are a few noble gas compounds but you have to really work at it to convince noble gases to form bonds. Fluorine is an extremely reactive gas, hence it is not a noble gas. It is a halogen - the most reactive halogen of them all.
No, neon is a noble gas. All noble gases are very inert. Thus, neon does not react with water, or most substances for that matter.
helium has the least density, xenon has the highest.
Not at all. Hydrogen is a very low-density highly flammable gas.
All noble gases are monatomic and exist as individual atoms.
If you know the name of the gas then look at a periodic table the noble gases are the one in the far right column or group 18 on the table The noble gases are very unreactive to other elements.