How does the atomic radii vary on moving (a) left to right in a period(b) down a group?
Answers
Explanation:
Atomic radius decreases from left to right within a period. This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smaller radius
The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase. 2) As you move across a period, atomic radius decreases.
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Answer:
while going from left to right in any period the electronegativity of elements goes on increasing and the electropositivity goes on decreasing.
Explanation:
An electron is added while going from left to right
because of which it becomes harder for the atom to donate electron and the atom becomes smaller while in the left of the periodic table the valency of the elements is less so they donate electron and their size is bigger.