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Subjects
Science State Board
Class 9
Periodic classification of elements
The different types of periodic table and it's elements
1.
Dobereiner's law: fill in the blanks
Exercise condition:
2
m.
Fill in the blanks:
1.
If lithium and potassium are two members of a Dobereiner triad, the third member is __________.
2.
According to Dobereiner's triad law the mass of sodium is __________?
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