Antimony (Sb) is a chemical element of the periodic table, located in the group 15 and the period 5, and is having the atomic number 51. It is a hard, brittle, lustrous, silvery-grey metalloid, whose name comes from the Greek word “anti-monos”, which means not alone. It is a member of the pnictogen group. On … Read more
Arsenic (As) is a chemical element of the periodic table, located in the group 15 and the period 4, and is having the atomic number 33. It is a brittle, silvery-grey metalloid, whose name comes from the Greek word “arsenikon”, which means the yellow pigment orpiment. It has three allotropes: grey, yellow and black. It … Read more
Germanium (Ge) is a chemical element of the periodic table, located in the group 14 and the period 4, and has the atomic number 32. It is a hard, lustrous, grayish-white metalloid, whose name comes from the Latin word “Germania”, which means Germany, homeland of the discoverer. It is a member of the carbon group. … Read more
Silicon (Si) is a chemical element of the periodic table, located in the group 14 and the period 3, and is having the atomic number 14. It is a hard, brittle, lustrous, dark-grey metalloid, whose name comes from the Latin word “silex” or “silicis”, which means flint or hard stone. It is the second most … Read more
Boron (B) is a chemical element of the periodic table, located in the group 13 and the period 2, and is having the atomic number 5. It is a dark, lustrous, black-brown metalloid, whose name comes from the Arabic word “buraq”, which means the mineral borax. It is the first element in the boron group … Read more
Astatine (At) is a chemical element of the periodic table, located in the group 17 and the period 6, and is having the atomic number 85. It is a dark, black, lustrous post transition metal, whose name comes from the Greek word “astatos”, which means unstable. It is highly toxic and is counted as one … Read more
Polonium (Po) is a chemical element of the periodic table, located in the group 16 and the period 6, and has the atomic number 84. It is a rare, silvery-grey or black post transition metal, which is named after Poland, homeland of Marie Curie. It is highly toxic and is counted as one of the … Read more
Bismuth (Bi) is a chemical element of the periodic table, located in the group 15 and the period 6, and has the atomic number 83. It is a brittle, silvery-pink post transition metal, whose name comes from the German word “wissmuth”, which means white mass. It is a member of the pnictogen group. On periodic … Read more
Lead (Pb) is a chemical element of the periodic table, located in the group 14 and the period 6, and is having the atomic number 82. It is a soft, malleable, lustrous, bluish-white post transition metal, whose name comes from the Anglo-Saxon word “lead”, which means metal. It is highly toxic and has a low … Read more
Thallium (Tl) is a chemical element of the periodic table, located in the group 13 and the period 6, and has the atomic number 81. It is a soft, malleable, lustrous, silvery-grey post transition metal, whose name comes from the Greek word “thallos”, which means green twig. It is highly toxic and is not available … Read more
