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
Lead is a chemical element with the symbol Pb and atomic number 82. It is soft and malleable, and also has a relatively low melting point. When freshly cut, It… Read More »Lead Chemical Element Properties
Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in Group 2 of the periodic table. Pure Ra is… Read More »Radium Element Properties
Actinium is a chemical element with the symbol Ac and atomic number 89. It was discovered in 1899 by French chemist André-Louis Debierne in pitchblende residues left after French physicists Pierre and Marie… Read More »Actinium Chemical Element
Francium is a chemical element with the symbol Fr and atomic number 87. It is extremely radioactive; its most stable isotope, francium-223 has a half-life of only 22 minutes. It is the second-most… Read More »Francium Chemical Element Properties
Thorium is a chemical element with the symbol Th and atomic number 90. In its pure form, it is a silvery-white metal that is stable in air and remains lustrous for several… Read More »Thorium Chemical Properties
Plutonium is a radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air and forms a dull coating when… Read More »Plutonium Element Properties
Curium is a hard metal having an atomic number of 96 and symbol Cm. This metal is artificially produced in the nuclear reactors. It is… Read More »Curium Element Properties