monatomic

"My grandfather played a single of Elvis Presley at the family gathering. "

"The meaning of the teacher's hand gesture was clear: "Pay attention." "

"Letters are the elements of written language."

"He adhered strictly to the diet his doctor prescribed."

"The project consists of three main parts. "

"The birthday balloons were filled with helium, which made them float to the ceiling. "

"The children packed their lunches separately, each with their own snacks and drinks. "

"This country house was occupied by nobles in the 16th century."

"Simple: "Life exists on Earth." Slightly more specific, but still easy to understand: "My old school still exists, even though it's been remodeled." "

"The teacher gave a good example of a sentence using the past tense. "

"The speaking portion of the exam made me nervous. "

"Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom and a chlorine atom."