Atomic symbol: Na
Atomic number: 11
Atomic mass: 22.99
Appearance: Soft, silvery white solid at 25°C
Series: Alkali metals
Electron configuration: 1s² 2s² 2p⁶ 3s¹
Highly reactive metal, readily oxidising in air.
Sodium burns with a yellow flame.
Fun Fact! Not all metals are rock hard. At room temperature, sodium is soft enough to cut with a butter knife!