Question

B. the elements of the second period of the periodic table are given below:

Li Be B C N O F

i) Give reason to explain why atomic radii decrease from Li to F.

ii) Identify the most metallic and non metallic element.

iii) What are group Numbers for elements Be, and O?

iv) Why ionization energy of “Be” greater than “B” and “N” greater than “O” explain?

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Answer 1

Answer:

atomic radii decrease on moving right side of period due to large postive charge on the nucleus the electrons are pulled in more close to nucleus.

ii metal =li and non metal = f

iii= Be belong to second group and O belong to 16group

iv = because Be has postive charge