If an atom has a mass number equals 39 and the number of neutrons equal 20, then
the atomic number
of electrons

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

The pressure inside a hydrogen-filled container was 2.10 atm at 21 ? c. what would the pressure be if the container was heated to 92 ? c ?

When a scientific theory has been tested and proved by the scientific community, it becomes a law