In 1803, John Dalton put forward an atomic hypothesis on the basis of results of various experiments and tests. On this hypothesis he deliberated on structure of matter, Fundamental Laws of Chemical Combinations, Physical and chemical changes. The results of many experiments and test proved the authenticity of the Atomic Hypothesis of Dalton and recognized it as a scientific theory.
As we know that all the elements can be categorized into three parts as Metal, Non Metal and Metalloid. All those elements which are good conductor of electricity and heat and possess metallic lustre, ductility, plasticity, tensile strength, malleability and whose oxides are basic except Beryllium Oxide, Aluminium Oxide and Zinc Oxide.
An atom is the smallest particle of an element that can be further divided into subatomic particles. These subatomic particles are Electron, Proton and Neutron. These are the fundamental particles of an atom.
Cations are formed by losing one or more electrons from the outer shell or orbit to achieve their octet or duplet. For example the atomic number of Lithium (Li) is 3 and its electronic configuration is 2, 1.
A blood Vessel is a tubular structure that encloses and transports blood throughout the whole body of a living being. There are three major kinds of blood vessels in a human body. These are Arteries, Veins and Capillaries.
Blood is a red coloured sticky fluid that flows in the blood vessels of each living beings. The colour of blood is bright red when it is pure or oxygenated. But it is dark red when it is impure or deoxygenated.