Zinc is a bluish-white, moderately hard metal. It is brittle at room temperature and at temperatures above 150Â°C, being workable only in the range between 100Â°C and 150Â°C.It is an active metal and will displace hydrogen even from dilute acids.The principal use of zinc is for the galvanizing of iron sheets or wires.inc is a bluish-white, moderately hard metal. It is brittle at room temperature and at temperatures above 150Â°C, being workable only in the range between 100Â°C and 150Â°C. It is an active metal and will displace hydrogen even from dilute acids. The principal use of zinc is for the galvanizing of iron sheets or wires.
Cooler stars emit much of their light in the red part of the spectrum, so you see them as red. Somewhat hotter stars, like our Sun, emit much of their light in the green (or yellow), with smaller amounts of red and blue. This balance of colors your eye sees as white.
Particles that are small compared with the light wavelength scatter blue light more strongly than red light. Because of this, the tiny gas molecules that make up our Earthâs atmosphere (mostly oxygen and nitrogen) scatter the blue portion of sunlight in all directions, creating an effect that we see as a blue sky. Within the visible range of light, red light waves are scattered the least by atmospheric gas molecules.