What is means of isolated gaseous atom

 

💨 Isolated Gaseous Atom – Meaning:

An isolated gaseous atom means:

👉 A single atom of an element
👉 In the gaseous state (not bonded to any other atom or molecule)
👉 That is completely free from external forces (like other atoms or molecules nearby)

🧪 In Simple Words:

An isolated gaseous atom is a lone atom in the gas phase, existing independently, just like:

  • A single He atom (Helium) floating alone in space
  • Not forming a molecule like O₂ or H₂
  • Not in solid or liquid form

🔍 Why Important in Chemistry?

It is a reference state used in:

  • Ionization energy
  • Electron affinity
  • Enthalpy calculations
  • Bond dissociation energies

These properties are usually measured for an isolated gaseous atom because:

  • There's no interference from other atoms.
  • It gives the purest form of an element's energy or behavior.

🧠 Example:

If we say:

"The ionization energy of an isolated gaseous hydrogen atom is 1312 kJ/mol"

It means: the energy required to remove one electron from a single H atom in gaseous, isolated state.

Let me know if you'd like the Hindi explanation too!

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