What are Prokaryotic Cells?
Prokaryotic Cells are cells that do not have a true nucleus or membrane-bound organelles. These are single-celled microorganisms known to be the earliest on earth.… Read More »What are Prokaryotic Cells?
Radium 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 Chemical Element
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 Chemical Element Properties
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
Qualities of Good Building Stones
Building Stones Characteristics The various properties of good building stones are: Structure: Broken stone should not look faded and its uniform texture should be free… Read More »Qualities of Good Building Stones
Thorium Chemical 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 Element 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 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
Protactinium Element Properties
Protactinium is a chemical element with the symbol Pa and atomic number 91. It is a dense, silvery-gray actinide metal that readily reacts with oxygen, water vapor, and inorganic acids. It forms… Read More »Protactinium Element Properties
Neptunium Chemical Element Properties
Neptunium is a chemical element with the symbol Np and atomic number 93. It is a radioactive actinide metal, neptunium is the first transuranic element. Its position in the periodic table just after uranium, named after the planet Uranus, led to… Read More »Neptunium Chemical Element Properties