Identify the period and group numbers of the element with the electron configuration. [ne]3s23p4

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge

Calculate the change in entropy if br2(l) is converted to br2(g). s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)