lanthanum

"Professor Davies is a learned scholar, renowned for her deep knowledge of ancient history. "

"The copper wire is very ductile, allowing it to be drawn into long, thin strands for electrical wiring. "

"The newspaper exposed the company's illegal dumping of waste. "

"Letters are the elements of written language."

"The number of protons in an atom's nucleus defines what element it is. "

"The chemistry class focused on how different elements combine to form new substances. "

"He is a student of life."

"The fish flashed its silvery scales as it jumped out of the water. "

"My doctor recommended periodic checkups for good health. "

"The scientist studied the chemical composition of the soil sample. "

"Careful storage of silver will prevent it from tarnishing."

"The teacher pointed to the map to show the students where the capital city was located. "