What does the stomach acid have in protein digestion

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

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.

What is the relationship between ozone and smog?