What is the shape of an SiH4 molecule?

The molecule SiH4 can be described as having a tetrahedral molecular shape because the 4 H atoms have bonded at a 109.5 degree angle to the Si atom which sits at the center.

SiH4 is also known as monosilane, silicane, silicon hydride and Silicon tetrahydride. It is a colorless gas that gives off a sharp unpleasant smell. The absence of carbon from this molecule makes it inorganic, however it can be used as a reducing agent in organic and organometallic chemistry. Silicane has various medical and industrial applications, however it does pose a fire hazard due to its flammability. Exposure to the gas can also irritate eyes.