2.define law of triads
3.what are advantages of debeniers law of rriads
4.what are disadvantages of law of triads
5.what are 3 triads he discovered in his life time
6.what are at wts of Li,Na,k
7.if at wts of Li and K are 7 and 39 what is weight of sodium according to law of triads
8.If x=10 ,y= 20 find z .using law of triads if x<y<z.
9.find y if x=4 z= 10.if x<y<z
10 .find x if y10 and z is 20 if x<y<z
11.what are at wts of cl,br,I
11.check whther cl,br !and l ibey law if triads
12.what are at wts of ca,sr,Ba .
13.check whther above elements obey law of triad
14.Dobenier belongs to which ckuntry and which year
15.why do we classify elements
16.define peridicity
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