During which type of change should you expect to see different chemical
symbols before and after the change?

The energy equivalent of the rest mass of an electron is

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

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3