Question

) Why do the periods in the periodic table have different number of element

Answer 1

Answer:

All the periods in the periodic table do not have the same number of elements in them as the number of elements in a period is determined by the quantum numbers. ... The second period has eight elements only since the two orbitals- 2s and 2p get filled. This happens for all the periods.

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Answer 2

Explanation:

all the period in the periodic table do not have the same number of elements in them as the number of elements in a period is determined by the quantum numbers.

for example the first period has two elements only since the first s orbital gets filled.

the second period has 8 element only since to aur bits -2 s and -2 p get filled receptions for all the periods

therefore it depends on the principle of quantum numbers and Azimuthal muthal quantum number