Symbols ` _ 35 ^(79) Br` and `_ ^(79) Br` can be written, whereas symbols `_ 79 ^(35) Br` and `_ ^(35) Br` are not acceptable. Answer briefly.

C_(3) H_(6) Br_(2) can show

Write Lewis symbols for atoms of the following elements : 'Mg, Na, B, O, N, Br'.

Electron gain enthalphy is the amount of energy involved when an isolated gaseous atom accepts an electron to form a monovalent anion the value of the electron gain enthalpy of halogens are given below: F : -328 KJ mol^(-1) Cl - 349 KJ mol^(-1) Br : -325 KJ mol^(-1) I : -295 KJ mol^(-1)Chlorine has more negative electron gain enthalpy than fluorine. why ?

Symbols of certain elements are given write down the electronic configuration and find the period and group in which they are included. _17^35Cl

Find out which of the following sentences are statements and which are not. Justify your answer . br The earth is a planet

Propyne and propene can be distinguished by : con. H_2 SO_4 , Br_2 in "CCI"_4 , Dil. KMnO_4 , AgNO_3 in NH_3

Electron gain enthalphy is the amount of energy involved when an isolated gaseous atom accepts an electron to form a monovalent anion the value of the electron gain enthalpy of halogens are given below: F : -328 KJ mol^(-1) Cl - 349 KJ mol^(-1) Br : -325 KJ mol^(-1) I : -295 KJ mol^(-1) Why the negative electron gain enthalpy decreases from chlorine iodine?

Symbols of certain elements are given. Write their electronic configuration and find the period and group in which 'they are included. 17^35Cl

A metal complex having composition Cr(NH_3)_4 Cl_2 Br has been isolated in two forms A and B . The form A reacts with AgNO_3 to give a white precipitate readily soluble in dilute aqueous ammonia, whereas B gives a pale yellow precipitate soluble in concentrațed ammonia. Write the formula,of A and B