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.
All stars begin as dust and tiny particles in a cloud of gas called nebulae. They develop into stars by passing through several stages over a period of millions of years. Once a star is born, it emits heat, light, x-rays, ultraviolet rays, gamma rays and other forms of radiation.