Answer: the correct option is O₂(oxygen gas)The molecule that is not a compound
Step-by-step explanation:
a. SiH₄ (silane):
SiH₄ has a tetrahedral structure. is a compound composed of silicon (Si) and hydrogen (H) atoms. The structure of SiH4 is tetrahedral, with the silicon atom at the center and four hydrogen atoms surrounding it. Each hydrogen atom forms a single covalent bond with the silicon atom, and all the bonds are equivalent in strength and length.
b. NH₃ (ammonia):
NH₃ has a trigonal pyramidal structure. Ammonia is a compound composed of nitrogen (N) and hydrogen (H) atoms. The structure of NH3 is trigonal pyramidal. The nitrogen atom forms three single covalent bonds with three hydrogen atoms, and it has one lone pair of electrons. The hydrogen atoms are arranged around the nitrogen atom in a pyramid shape.
c. H₂O (water):
H₂O has a bent structure. Water is a compound composed of two hydrogen (H) atoms and one oxygen (O) atom. The structure of H2O is bent or V-shaped. The oxygen atom forms two single covalent bonds with two hydrogen atoms, and it has two lone pairs of electrons. The hydrogen atoms are located on one side of the oxygen atom, resulting in a bent molecular shape.
d. O₂ (oxygen gas):
O₂ (oxygen gas) exists as a diatomic molecule with a linear structure. Oxygen gas consists of two oxygen (O) atoms bonded together. The structure of O2 is linear. The two oxygen atoms are connected by a double covalent bond, sharing four electrons in total. Each oxygen atom has two unshared electron pairs.