Which of the following electronic transitions is consistent with a decrease in energy?
◦ From a 5s subshell to a 4d subshell
◦ From a 4f subshell to a 5p subshell
◦ From a 6s subshell to a 5d subshell
◦ From a 5s subshell to a 5p subshell
◦ From a 4f subshell to a 6p subshell