Gymnosperms are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes. The word Gymnosperm comes from the Greek words gymnos, Which means… Read More »What are Gymnosperms?
Thallium is a chemical element with the symbol Tl and atomic number 81. It is a gray post-transition metal that is not found free in nature. When isolated, Tl resembles tin but… Read More »Thallium Properties
Polonium is a chemical element with the symbol Po and atomic number 84. It was discovered by Marie Sklodowska Curie and Pierre Curie in 1898. Rare and highly radioactive metal with no stable… Read More »Polonium Chemical Element Properties
Mercury is a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum. As a chemical element, It cannot be created or destroyed. The… Read More »Mercury Chemical Element Properties
Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth’s crust, occurring only as of the decay product of various… Read More »Astatine Chemical Element Properties
Radon is a chemical element with the symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas. It occurs naturally in minute quantities as an intermediate step in the normal… Read More »Radon Element Properties