Answer
See answer below.
Work Step by Step
The elements are silicon, sulfur, selenium, tin and antimony.
Silicon
Symbol: Si, atomic number 14, atomic weight 28.085, group 14 (4A), period 3, Metalloid.
Sulfur
Symbol: S, atomic number 16, atomic weight 32.06u, group 16 (6A), period 3, Nonmetal.
Selenium
Symbol: Se, atomic number 34, atomic weight 78.971, group 16 (6A), period 4, Nonmetal.
Tin
Symbol: Sn, atomic number 50, atomic weight 118.71u, group 14 (4A), period 5, Metal.
Antimony
Symbol: Sb, atomic number 51, atomic weight 121.76u, group 15 (5A), period 5, Metalloid.
