Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Preparation of Hydrogen High purity hydrogen (>99.9 %) is obtained by the electrolysis of water containing traces of acid or alkali or the electrolysis of aqueous solution of sodium hydroxide or potassium hydroxide using a nickel anode and iron cathode. However, … [Read more...] about Preparation of Hydrogen
Chemistry
Position in Periodic Table
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Position in Periodic Table The hydrogen has the electronic configuration of 1s1 which resembles with ns1 general valence shell configuration of alkali metals and shows similarity with them as follows: It forms unipositive ion (H+) like alkali metals (Na+, K+, … [Read more...] about Position in Periodic Table
Periodic Trends in Chemical Properties:
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Periodic Trends in Chemical Properties: So far, we have studied the periodicity of the physical properties such as atomic radius, ionisation enthalpy, electron gain enthalpy and electronegativity. In addition, the chemical properties such as reactivity, valence, … [Read more...] about Periodic Trends in Chemical Properties:
Periodic Trends in Properties
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Periodic Trends in Properties As discussed earlier, the electronic configuration of the elements shows a periodic variation with increase in atomic numbers. Similarly a periodic trend is observed in physical and chemical behaviour of elements. In this section, we … [Read more...] about Periodic Trends in Properties
Grouping of Elements Based on Electronic Configurations
Find free online Chemistry Topics covering a broad range of concepts from research institutes around the world. Grouping of Elements Based on Electronic Configurations In the modern periodic table, the elements are organised in 7 periods and 18 groups based on the modern periodic law. The placement of element in the periodic table is closely related to its outer shell … [Read more...] about Grouping of Elements Based on Electronic Configurations