Lead -typically used in batteries and shotgun shells. Germanium-It is primarily used in transistor. Silicon-It is extensively used in chips and detergents These group elements mostly form covalent compounds.Ĭarbon-An entire field of chemistry is related to carbon containing compounds known as organic chemistry. These elements have three electrons in their valence shell. Their general electronic configuration is ns 2np 1. Thallium-It is a very toxic element ,sometimes found in photocells. Indium-It is found in photocells and transistor. Gallium-It is used in electronics and technology,also used in chips and lamps These elements obtained from earth crust because of these reasons these elements are called as alkaline earth metals.Īluminium-It is used in packaging various things The hydroxides of these group elements are basic in nature and soluble in water. These elements have two electrons in their valence shell. Their general electronic configuration is ns 2. Radium-It is used in paints and most importantly used in radiation therapy for cancer. Strontium- Strontium is mainly used in color television tubes and because of red color they are often used in fireworks.īarium- It is used in paint pigments and barium alloys are used in wires.
Magnesium-It is used in well known antacids such as milk of magnesia,because of its low weight it is used in certain parts of aircraft.Ĭalcium - It is a very important element of our body,most important for bones and teeth.It is also major contributor to lime stone and marble. The group 1 elements need to be stored under oil to prevent them reacting with oxygen and water vapour in the air.īeryllium - In pure form,It is very toxic ans thus does not have any real life applications. Metal + water → metal hydroxide + hydrogen Lithium, sodium and potassium all react vigorously with water to form a metal hydroxide and hydrogen: This group elements are also known as alkali metals as the hydroxides of these group elements are basic in nature and soluble in water. These elements have one electron in their valence shell. Their general electronic configuration is ns 1. Rubidium -It reacts with oxygen quickly and is useful in vacuum tubes and photocells.Ĭesium- It is mainly used in research of ion propulsion engine that are used in space.įrancium-Because it is rare and unstable,no well known use is available. Potassium-It is used in fertilizers and in due to yellow color it is used in fireworks too. Sodium- It is commonly used in table salt,borax,baking soda and it is also used in paper ,textile industries. Lithium - Lithium salts burn an intense shade of red and udes in fireworks and pyrotechnics. The elements of group -1, group-2 and group-13 to group-17 are the representative elements.These are also called as main group elements. The elements in the modern periodic table were classified into four types. They are
So Mendeleev’s Periodic law was modified and atomic number was adopted as the basis of the Modern Periodic Table. In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property than its atomic mass. \[2\text)\).The systematic arrangement of elements into groups and periods is called periodic table. The balanced equation for the reaction is: The electron is therefore transferred from sodium to chlorine: Sodium is part of a metallic lattice and the individual atoms must first break away from the lattice. Chlorine is a diatomic molecule and so for it to take part in ionic bonding, it must first break up into two atoms of chlorine.
0 kommentar(er)
