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lanthanide elements names
Uses Trihydric alcohols (a) It is used as antifreeze in automobile radiator. (b) It is used in the preparation of good quality of soap-hand lotions shaving creams and tooth
writethe sort farmula of learn the pariodik table.
A sub-shell l= 2 can take how many electrons: (1) 3 (2) 10 (3) 5 (4) 6 Ans: 10
An element have atomic weight 40 and it's electronic configuration is 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 . Then its atomic number and number of neutrons will be: (1) 18 and 22
Extension
Definitions Oxidation exactly meant 'combination with oxygen' and reduction 'removal of oxygen'. These definitions have been illustrated. Oxidation implies combination with a
The first use of quantum theory to explain the structure of atom was made by: (1) Heisenberg (2 )Bohr (3) Planck (4) Einstein Ans: Bohr
Q. Determine Equilibrium Constants for Acid and base? Ans. The pH scale of acidity is a simple and convenient way to state the acidity of a solution. The
Q.Briefly describe about Nitrogen? Ans. Nitrogen is a gas that makes up approximately 79% of the atmosphere. It exists in the form of the diatomic molecule N 2 . In this f
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