energy levels wrong.
Mg. I is a non-metal and Si and Ge are metalloids.
Yes galaxies emit light
The earth does not emit light, but it does reflect light from the sun.
Si and Ge have similar chemical properties due to how close they are on the periodic table. Silicon and GermaniumÊare both metalloids.
Planets cannot emit light. They merely reflect light from nearby stars.
Ge and si are not used for Making led's because these two emitts less amount in form of light and larger amount in form of heat.
For Si it is 0.6or 0.7 and for Ge 0.3 or 0.2.Both values correct for both si and ge
Ge
Mg. I is a non-metal and Si and Ge are metalloids.
Ge has higher conductivity than Si. Because at room temperature the electron and hole mobility for Ge is larger than those of Si. Another explanation is the lower band gap of Ge than Si.
the energy required to break covalent bond in si is 1.1ev and in ge is 0.7ev
for germanium it is 0.3 and for silicon it is 0.7
格雷格(ge lei si )or 格瑞格(ge rui si)
Light bulbs emit light.
Technetium doesn't emit light.
Yes galaxies emit light
bulbs emit light