five basic elements of matter

Borax is slightly hydrolyzed in solution. As boric acid is a weak acid, the solution is alkaline in nature...

Ammonia molecule has a strong tendency to donate its lone pair of electrons of nitrogen to other molecules. Thus, it acts like a strong Lewis base. In aqueous solutions, NH 3 ionizes in accordance with the reaction...

It is important to know the atomic picture of matter. The basic unit of all matter is an 'atom'. Each atom consists of a small core called nucleus which accounts to most of its mass consisting of positively charged protons and neutral neutrons and surrounded by lighter..

Matter that is divided into pure and impure substances can be further categorized. Pure substances can be divided into 'elements' and 'compounds'; impure substances, commonly called 'mixtures' can be further divided into homogeneous' and 'heterogeneous' mixture..

An element is defined as a pure substance as it is made up of only one kind of atoms having the same atomic number. The smallest particle of an element is the atom, which has all the properties of that element. It cannot be further reduced to simpler substances by ord..

Even before knowing what elements were, man started extracting them from their ores. A few metals like gold, silver, iron, copper, lead, tin and mercury were used even in the 1 s t century A.D. A mention of them is made in the 'Charaka Samhita' - a medical treatise of ancient India. These..

States of Matter - All matter consists of atoms and molecules. Each of these atoms and molecules has certain amount of energy. The level of this energy decides the state in which the matter exists. When heat energy is supplied to matter, this energy level ris..

The oxides of elements in a period become progressively more acidic as one goes from left to right in a period of the periodic table. For example, in third period, the behavior of oxides changes as follows:..

a) Open system - A system, which can exchange matter as well as energy with the surroundings is called an open system. For e.g., hot coffee in an open flask because it can gain or loose matter and energy with the surroundings. fig 4.1 - Example of open syst..

Basic fluxes like lime (CaO), magnesium oxide (MgO) are used to remove acidic gangue such as SiO 2 ...