Pls help me Will mark you as brain pls help me for these 2 questions just say top or bottom for which answers you pick

How many neutrons does plutonium -196 with an atomic number of 78.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.