Which of the following values represents an atmosphere that poses an immediate hazard to life or produces immediate, irreversible, debilitating effects on health?

Each of the following statements about electromagnetic radiations is true except one. Which one is the exception?

A) They have a negative electrical charge. B) They have no mass. C) They pass through space as particles and in a wavelike motion. D) They have no weight.

A ___________________________ is a record kept in the medical office to track frequency of drug refills

Fill in the blank(s) with correct word