What is the physical state of substance in a chemical reaction? What are the symbols of physical state?

Does the energy in a solid increase or decrease when changing to a liquid?

What is another way to determine mass times acceleration?

Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form.