1. Divya was asked to pick a diatomic chemical compound from the laboratory. She found four compounds in different test tubes. Which of the following do you suggest Divya to select?
2.Emma asked a puzzle to her friends. Help them to solve Emma’s puzzle.
“X is the name of a category of chemical elements. X produces no sound when they collide among themselves. X is so soft. What is X?”
“X is the name of a category of chemical elements. X produces no sound when they collide among themselves. X is so soft. What is X?”