Wavelength is measured from crest to crest.
#48 might be (A) but in not for sure
Unstable isotopes occur when the strong force is unable to overcome the <span> <span>electrostatic force.</span></span><span>
There are no stable isotopes in the elements at the upper end of the periodic table, which clearly demonstrates the limit of the ability of the nuclear binding energy or the residual strong force, to overcome the electrostatic repulsion of all those protons in the nucleus.
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No. of moles = given mass/atomic mass
= 452/40
= 11.3.
Thus, there are 11.3 moles
