What is Mercury the planet made of?

Answer 1

The planet Mercury is thought to be mostly iron, about 70% of the planet's mass. It is covered by a comparatively thin crust of rock, including mountains and plains. Mercury has many craters from asteroid and meteor impacts, primarily due to the lack of an atmosphere.

The composition of Mercury's very thin, ionized atmosphere :

42% Molecular oxygen

29.0% sodium

22.0% hydrogen

6.0% helium

0.5% potassium

Trace amounts of argon, nitrogen, carbon dioxide, water vapor, xenon, krypton, & neon

Water ice, left over from impacting objects, may exist at the bottom of craters near either pole. The heat on the sunward side has apparently not melted the rock to smooth out the impact craters, and the atmosphere is too thin to carry much heat to the poles or the night side.

The planet Mercury is the densest of all the planets and consists of approximately 70% metallic and 30% silicate material.

Answer 2

Mercury is made up of 42% molecular oxygen 29.0% sodium 22.0% hydrogen 6.0% helium 0.5% potassium