How does atomic radius change from left to right across a period in the periodic table?

Atomic radius decrease across the period from left to right because in moving from left to right the nuclear charge increase but the number of electrons remains the same ... this unusual disturbances make electrons come closer to the nucleus due to the reason that more protons are present in nucleus of atom as compared to the no of electrons. So attraction occurs between two and thus causes the atomic radius to decrease as going from left to right