Best Answer: Silicon is the fourteenth element of the periodic table and is a Group IVA element, along with carbon germanium, tin and lead.Pure silicon is a dark gray solid with the same crystalline structure as diamond. Its chemical and physical properties are similar to this material.Silicon has a melting point of 2570Â° F (1410Â° C), a boiling point of 4271Â° F (2355Â° C), and a density of 2.33 g/cm3.Source(s): http://en.wikipedia.org/wiki/Silicon.est Answer: Silicon is the fourteenth element of the periodic table and is a Group IVA element, along with carbon germanium, tin and lead.
Color blindness (sometimes spelled colour-blindness; also called race blindness) is a sociological term for the disregard of racial characteristics when selecting which individuals will participate in some activity or receive some service.
Color blindness, also known as color vision deficiency, is the inability to distinguish colors and shades or to recognize them at all. It occurs when the color-sensing cones of the retina are absent or do not function properly. About 8 percent of males and 1 percent of females are color-blind to some degree. Most color-blind people have difficulty in distinguishing among various shades of the same color or seeing some colors as brightly as others; the inability to distinguish any colors at all and see the world in black-and-white is rare. Most color blindness is inherited and present at birth.