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Q. Explain about Dihalide? Dihalides: Dichlorides and dibromides are formed by the lower members of the group, viz., Se, Te and Po. These are formed mainly by dissociation of t
why YbS and YbI2 are semiconducting solids but LaS and LaI2 show metallic character..
Q. Describe about Dioxides? These are generally obtained by heating the element in air. The dioxides of Se and Te can also be prepared by treating the element with conc. HNO, f
what is an ionic compound
For a hydrogen atom, calculate the wavelength (in nm) of an emitted photon in the Lyman series that results from the transition n = 3 to n = 1
the density of 2 molal aqueous solution of NaOH is 1.10g/L. Calculate the molarity of the solution.
C3N4
descuss properties of transition elements
The number of unpaired electrons in carbon atom in excited state is: (1) One (2) Two (3) Three (4) Four Ans: Four
What is the mass of electrons in grams?
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