How many electrons are present if a bromine ion has a charge of -1

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.

What is the mass of 0.46 mil of mgcl2

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.