The number of neutrons in the nucleus of a bromine atom that has a mass number of 80 is
A. 35 neutrons.
B. 40 neutrons.
C. 45 neutrons.
D. 80 neutrons.
Question 2
What is the physical quantity expressed by the following measurement: 10.0 s?
A) length
B) mass
C) temperature
D) time
E) volume