What Is The Density Of Helium?

Are you curious to know what is the density of helium? You have come to the right place as I am going to tell you everything about the density of helium in a very simple explanation. Without further discussion let’s begin to know what is the density of helium?

What Is The Density Of Helium?

Helium, with its unique properties and varied applications, is often referred to as the “lighter-than-air” gas. Its low density and non-reactive nature make it valuable in a range of industries, from party balloons to scientific research. But what exactly is the density of helium, and why is it lighter than most other gases? In this blog, we’ll explore the concept of density, delve into the specific density of helium, and explain why it’s so fascinating.

Understanding Density

Density is a fundamental physical property that quantifies how much mass is packed into a given volume. It’s calculated by dividing an object’s mass by its volume and is typically expressed in units like kilograms per cubic meter (kg/m³) or grams per cubic centimeter (g/cm³). In the context of gases like helium, density refers to how much of the gas is contained within a specific volume.

Density Of Helium

Helium is a remarkable element with the atomic number 2 and the chemical symbol He. It is the second lightest and second most abundant element in the universe after hydrogen. Helium is particularly well-known for its low density, which is why it’s often used to make balloons float and even for creating helium-filled airships, such as blimps and zeppelins.

The density of helium at standard conditions—0 degrees Celsius (32 degrees Fahrenheit) and 1 atmosphere of pressure (101.3 kPa)—is approximately 0.179 kg/m³ (kilograms per cubic meter) or 0.000179 g/cm³ (grams per cubic centimeter). This exceptionally low density is what allows helium-filled balloons to rise in the air, defying gravity.

Why Is Helium So Light?

Helium’s low density can be attributed to several factors:

  1. Atomic Mass: Helium is unique in that it consists of two protons, two neutrons, and two electrons. With an atomic mass of approximately 4 atomic mass units (AMU), it’s one of the lightest elements on the periodic table. This light atomic mass contributes to its low density.
  2. Monatomic Gas: Helium exists as a monatomic gas in its natural state, meaning it is composed of individual helium atoms rather than molecules. This monatomic nature makes helium less dense than diatomic gases like oxygen (O2) and nitrogen (N2), which consist of pairs of atoms in each molecule.
  3. Weak Intermolecular Forces: Helium atoms have very weak intermolecular forces compared to other gases. This means they’re more spread out and have less attraction between them, resulting in lower density.

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Applications Of Low-Density Helium

The low density of helium has various practical applications, including:

  1. Balloons: Helium-filled balloons float because the gas is less dense than the surrounding air. This has made helium a popular choice for creating colorful and buoyant party balloons.
  2. Airships: Helium was historically used in airships, such as the famous zeppelins. Its low density allowed these vehicles to achieve lift and carry passengers or cargo.
  3. Cryogenics: Helium is used as a cryogenic cooling agent due to its low boiling point, which is close to absolute zero. It’s vital for cooling superconducting magnets in applications like MRI machines.
  4. Research and Science: Helium is an essential element in scientific experiments, from cryogenics to spectroscopy. Its low density is valuable in gas chromatography and other laboratory techniques.


Helium’s remarkably low density sets it apart from most other gases, making it a fascinating and versatile element. Its buoyant properties have led to its use in balloons and airships, while its significance in cryogenics and scientific research underscores the practical applications of this “lighter-than-air” gas. Understanding the density of helium is essential for appreciating its role in a wide range of industries and scientific endeavors.


What Is The Density Of Helium In G Ml?

This colorless liquid has a very low viscosity and a density of 0.145–0.125 g/mL (between about 0 and 4 K), which is only one-fourth the value expected from classical physics.

What Is The Density Of Helium Gas In Kg M3?

The main physical difference between helium and air is the density: 0.166 kg/m 3 for helium versus 1.21 kg/m 3 for air.

What Is The Density Of Solid Helium?

The calculated density of solid helium at 1.15°K and 66 atmospheres is 0.214±0.006 gram/cc.

What Is The Density Of Helium In Kg?

Helium has a density of 0.1786 kg/m3, and air has a density of 1.275 kg/m3.

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