A certain mass of a gas occupies 40litres at760mmHg. what will be its volume at 5atom?

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

What’s a special glass that most beakers are made of

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.