Final answer:
SiH4, or silane, comprises four covalent bonds formed between the silicon atom and four hydrogen atoms and has no lone pairs on the silicon atom. So the correct answer is D. 4 bonds, no lone pairs.
Step-by-step explanation:
The molecule in question is SiH4, silicon tetrahydride (also known as silane). This compound consists of one silicon atom covalently bonded to four hydrogen atoms. In SiH4, the silicon atom has four valence electrons, and each hydrogen atom has one valence electron. Silicon forms four covalent bonds with the hydrogen atoms, utilizing all four of its valence electrons. Hydrogen atoms, having only one electron, can form only one bond and do not have lone pairs. Consequently, the molecule SiH4 has four bonds and no lone pairs on the silicon atom. Therefore, the correct answer to the question is D. 4 bonds, no lone pairs.