Well, it ain't, at least not at high pressures.
At room temperature and pressure (rtp), fluorine is a gas.
Ideal gases are gases with negligible intermolecular forces and molecular volumes. Real gases have intermolecular forces and have definite volumes at room temperature and pressure (RTP).
Helium is close to behaving as an ideal gas under typical conditions due to its low atomic mass and the relatively weak intermolecular forces between helium atoms. However, it deviates slightly from ideal gas behavior at very high pressures or low temperatures.
Helium behaves most like an ideal gas at low pressures and high temperatures. In these conditions, the helium atoms are far apart and experience minimal intermolecular forces, allowing them to follow the ideal gas law closely.
The gas that has properties most similar to an ideal gas among the options given is helium (He). Helium is a monatomic gas with low molecular weight and weak intermolecular forces, making it behave more closely to an ideal gas compared to the diatomic gases such as N2 and O2, or heavier gases like Xe.
At 0C and 1 atm, the gas that is best described by the ideal gas law is helium.
Helium
At RTP the assumed temperature is 293ºK, at STP the assumed temperature is 273ºK. The formula used for this is Pressure x Volume = moles x ideal gas constant x Temperature. So Volume = (moles x ideal gas constant x temperature) / Pressure Assuming Pressure and moles stays constant... Volume at RTP = ( 1 mole x 8.31451 x 293 K ) / ( 101.325 Pa) Volume at RTP = 24.0429 Volume at RTP = 24.0dm^3 Volume at STP = ( 1 mole * 8.31451 * 273 K ) / ( 101.325 Pa) Volume at STP = 22.4017 Volume at STP = 22.4dm^3
At room temperature and pressure (RTP), which is typically defined as 20°C and 1 atmosphere, 1 mole of gas particles occupies approximately 24.0 liters. This volume is derived from the ideal gas law under standard conditions for gases. The specific volume may vary slightly depending on the gas and its properties, but 24.0 liters is a commonly accepted value for many gases at RTP.
Helium is most likely to behave as an ideal gas when it is under conditions of low pressure and high temperature. Ideal gases follow the ideal gas law, which assumes the gas molecules have negligible volume and there are no intermolecular forces between them. At low pressure and high temperature, the molecules are far apart and moving quickly, closer to the assumptions of an ideal gas.
Helium is the most ideal gas because it is non-toxic, non-reactive, and has low density, making it safe for a wide range of applications such as in medical imaging, deep-sea diving, and helium-filled balloons. It is also chemically inert, making it suitable for a variety of environments.
The volume occupied by 15 g of helium can be calculated using the ideal gas law equation. First, convert grams to moles using the molar mass of helium. Then, apply the ideal gas law equation, V = nRT/P, where n is the number of moles, R is the ideal gas constant, T is the temperature, and P is the pressure.