Carbon: The atomic number of carbon is 6 and its atomic weight is 12.Some of these elements hold an extremely important place in the human civilization and have always done so. These elements include carbon, silicon, germanium, tin and lead. These are perhaps a few of the most common and the most important elements of the periodic table. Group IV elements of the periodic table contain four electrons in their outermost shell. It is also used in semi-conductors, LEDs and for recording temperatures that would vaporize a thermometer. Solar panels on the Mars Exploration Rover also contained gallium arsenide. It is an important component of many semiconductors and is used in red LEDs (light emitting diodes) because of its ability to convert electricity to light. ![]() Gallium arsenide has a similar structure to silicon and therefore it is a useful silicon substitute for the electronics industry. the Melting point of Gallium is 29.7646☌.
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