1) Which of these is a periodic property?
A Atomic radius
B Chemical reactivity
C Electron affinity
D ALL OF THE ABOVE
2)Which of these is a new theory of periodic classification of elements?
A Dobereiner's triad law
B Modern Periodic law
C Newland's law of octave
D Mendeleev's periodic law
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- D ALL OF THE ABOVE
- D Mendeleev's periodic law
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