Question

18. On moving from left to right in a period of the periodic table the atomic number of the element
increases, what happens to the size of atoms of elements on moving from left to right in a
period
A) Increases
B) decreases
C) remains the same
D) First Increases then decreases​

Answer 1

Answer:

B)Decreases

Explanation:

On moving from left to right in a specific period,the orbit remains in the molecules are same but the number of electrons in the activated orbit(last orbit) increases gradually.as the protons also increases, the static attraction of electron and nucleus is more powerful in the right sided molecules than the left sided molecules in a certain period.as for that the last orbit come closer to nucleus and the size of molecule decreases when we go right from left.(in case of any certain period and)