Monatomic gases formula is a gas composed of single-atom molecules, such as helium or sodium vapor. These are distinct from polyatomic gases containing two or more atoms per molecule. The thermodynamic behaviour of a monatomic gas at ordinary temperatures is elementary, as it lacks the rotational and vibrational components that characterize their polyatomic counterparts. As such, its heat capacity does not depend on temperature or molecular/atomic weight, whilst its entropy (a measure of disorder) is determined solely by temperature and molecular weight.
Also Read: Molar Volume Formula
From this, the behavior of real gases is described quite accurately by the general gas law at elevated temperatures. However, it does not obey the equation when they are near their condensation point - the temperature at which they liquefy. To make the general law applicable to any gas, Avogadro's law is utilized and the constant for specifying the amount of gas is expressed using gram-moles and molecular weight in grams. As a result, we get the equation of state pv/t = nR, where R refers to the universal gas constant.Also Read - Malic Acid Formula
The noble gases are single-atom molecules that, at standard temperature and pressure (STP), hold a full outer valence shell, making them relatively non-reactive. Historically described as inert elements, only helium, and neon have yet to form chemical compounds. However, when grouped together with homonuclear diatomic gases like nitrogen (N2), they are known as “elemental” or “molecular” gases; distinct from molecules of compounds.Also Check - Iron (III) Hydroxide Formula
The noble gases are monoatomic, which means that they are non-reactive. These glasses can be used for applications such as: