BRAINLIEST! Moving from the element with atomic number 10 to atomic number 11 on the periodic table, there is a change in reactivity. In three to
five sentences, identify the direction of the change and give two reasons for the change.

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