Question

Which Of The Following Statement Is Or Are Correct?
The period number of an element is equal to the number of shells in its atom


If two (or more) elements have the same valence shell, then they belong to the same period of the periodic table.


The group number of an element having up to two valence electrons is equal to the number of valence electrons.


All the above

Answer 1

Answer: all the above are correct

Explanation:

Answer 2

Explanation:

all the above are correct dude