Elements in the Modern Periodic table are arranged in order of___
Modern periodic law had been given by
How many periods and groups are present in the periodic table?
The elements in group 18 are called
In periodic table elements with same number of shells/orbits are placed in___
Which of the following elements has 2 shells and both are completely filled?
An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom?
An element M is in group 13th of the periodic table, the formula for its oxide is
What is the other name for group 17 elements?
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