Selina Concise Class 8 Chemistry Solution Chapter No. 3- ‘Elements, Compounds and Mixtures’ For ICSE Board Students. 1) a) Element : The substance which is made up of same kind of atom are called element. Or Elements is the substance which can not break into simpler one. b) Compound : When two or more elements […]
Category: Chemistry
Selina Concise Class 8 Chemistry Chapter 1 Matter Solution
Selina Concise Class 8 Chemistry Solution Chapter No. 1- ‘Matter’ For ICSE Board Students. 1) Solution: Anything’s around us ( pen, pencil , chalk , board , desk , bench , etc.) which has mass and volume are known as matter . The particles or molecules of matter closely attached or connect with attraction force […]
Tennessine
Tennessine ( Ts ) Define: Tennessine is semi metal it is place below Astatine .it is place in halogen family. It is radioactive element and toxic in nature. It is 2nd number heaviest element. It is man made element and produce in nuclear reactor. Discovery : it is discovered in 2010 by scientist yurioganessian and […]
Mendelevium
Mendelevium ( Md ): Define: Mendelevium is inner transition metal place at 12th number at actinides series. It is transuranic element. It is made by bombarding of Einsteinium with alpha particles. Discovery : mendelevium is discovered in 1995 by scientist Albert Ghiorso and colleagues. Origin of name :the name gives for the honour of Mendeleev […]
Rhodium
Rhodium : Define: Rhodium is transition metal which is present extremely rare on earth. It show hard ,shiny , and lustrous properties . It is non radioactive metal . It is found in earth crust in in combined form with platinum . It is found as by product in nickel and copper purification process. It […]
Seaborgium
Seaborgium ( Sg ) : Define: Seaborgium is Transectinide metal . It is place below Tungsten .it is transuranic element. It is radioactive in nature and toxic .it is man made element. It is formed in laboratory by bombarding californium -249 with oxygen – 16 isotope nuclei . Discovery : it is discovered in 1974 […]
Rutherfordium
Rutherfordium (Rf ) : Define: Rutherfordium is transectinides metal place below Hafnium .it is man made element . It Is called transuranic element. It is radioactive in nature. It is produce by bombarding californium – 249 Isotopes with carbon – 12 isotopes nuclei Discovery : it is discovered in 1969 by scientist Georgyflerov and colleagues […]
Roentgenium
Roentgenium ( Rg ) : Define: Roentgenium is Transectinide metal . It is place below gold . It is transuranic element . It is highly radioactive and toxic in nature. It is man made element produce in laboratory . It Is made by fusing Nickel and bismuth alloy in a heavy ion accelerator. Discovery : […]
Oganesson
Oganesson ( Og ) : Define: Oganesson is zero group element .it is gaseous form element .it is place in inert gas group .it is place below Radon .it is transuranic element .it is radioactive and toxic in nature .it is man made element Discovery : it is discovered in 2006 by scientist in joint […]
Nobelium
Nobelium ( No ) : Define: Nobelium is inner transition metal . Place at 13th number in actinides series. It is man made element . It is highly radioactive. It is trans uranium element . It is radioactive element . It is toxic in nature due to reactivity It is formed by bombarding Of curium […]