A. Solid state
B. Liquid state
C. Gaseous state
D. Plasma state
C. Gaseous state
At ordinary temperature (around room temperature) and pressure, hydrogen exists as a gas. It’s the lightest element and due to its weak intermolecular forces, it readily fills the available volume as a gas.
- Solid hydrogen: Requires extremely low temperatures (below -259°C) to solidify.
- Liquid hydrogen: Achieved at very low temperatures (around -253°C) and remains a liquid even at room temperature if kept in a well-insulated container.
- Plasma state: Requires very high temperatures and is not the typical state for hydrogen under normal conditions.
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