Question

screening effect is not common for the electrons of the period​

Answer 1

Answer:

Normally, the screening effect takes place for the elements which have a high atomic number and have a large number of electrons in their inner orbits. These inner orbit electrons act as a screen and protect each other from the nuclear charges. Here all three elements have a small atomic number and have only 1 electron thus does not have enough electrons to perform screening effect.

Answer 2

Answer:

1 2 3 periods

Explanation:

since there arent mant electrons in the shells subshells and due to abscene f electron in d orbitals there isnt considerable sheilf=ding effect

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