Which of the following is the electron configuration of P in…

Which of the following is the electron configuration of P in its ground state? (A) 1s21p62s22p6                      (B) 1s22s22p33p33d4                (C) 1s22s22p33s23p2                  (D) 1s22s22p63s23p3                     (E) 1s22s22p43s23p4

What is the frequency of light of wavelength 7000 Å?   A) 8….

What is the frequency of light of wavelength 7000 Å?   A) 8.41 x 1015 s–1                 B) 4.72 x 1014 s–1                  C) 2.48 x 1013 s–1                   D) 6.67 x 1015 s–1            E) 4.29 x 1014 s–1