Unless you're able to provide a diagram representing the problem, there's not much I can do so solve this problem.
The two most abundant elements in the universe are HYDROGEN AND HELIUM. Hydrogen is the most abundant element followed by helium.
Hydrogen is the lightest of all element and the first element to be formed, followed by helium which has just two atoms.
Solid! The molecules in solid matter are arranged closely together and packed quite tightly to maintain a regular shape. Hope this helps!
The scientist that was the first to use the telescope in astronomy was Newton