Auditory processing disorder (also known as central auditory processing disorder or CAPD) is a condition that makes it hard for kids to recognize subtle differences between sounds in words. It affects their ability to process what other people are saying.
Gallium is a solid metal at room temperature, but it melts in your hands. 00:09. When gallium is in its liquid state, if feels like cold melted solder in your hands. 00:33. Melting gallium onto aluminum makes the aluminum brittle enough to break with your fingers.
Zirconium and hafnium metals, like titanium, are hard and resistant to corrosion. These metals resemble stainless steel in appearance with melting points of 1855 and 2222 Â°C respectively. Heating zircon sand in the presence of graphite in an electric furnace forms the carbides.