Potassium is expected to have the greater atomic radius from the given choices of element.
Atomic radius is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between two nuclei in the solid states of metals.
Across a period, the atomic radii decreases progressively from left to right.
This is due to the progressive increase in the nuclear charge without increase in the number of electronic shells.
<span>Pitch and frequency are more or less the same thing - high pitch = high frequency. The freqency of vibration of a string f = 1/length (L) so as length decreases the frequency increases.</span>
one of the answers that i found was 5.83 m i did some more research and it showed the same answer again. good luck with it. hope i was able to help you.