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Elements in the modern periodic table are arranged on the basis of their
Elements in the modern periodic table are arranged on the basis of their atomic number.
Which is the longest period in the modern periodic table?
The sixth period is the longest period in the modern periodic table and contains 32 elements.
Oxides of alkaline earth metals are ________ in nature.
Oxides of alkaline earth metals are basic in nature.
The elements with atomic number from 58 to 71 are called
The elements with atomic number from 58 to 71 are called lanthanides.
Across the period, the number if valence electrons
Across the period, the number of valence electrons increases.
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