Topic Details (Notes format)

What is the atomic number of hydrogen?

What is the most common state of matter in the universe?

What is the unit of frequency?

What type of electromagnetic radiation has the longest wavelength?

Which gas is most abundant in Earth’s atmosphere?

What is the term for water changing from liquid to gas?

Which acid is found in the human stomach?

What is the pH of pure water at 25°C?

What is the unit of force in the SI system?

Which particle is responsible for the negative charge of an atom?