If we increase the temperature then the more no of electrons get the energy to jump from conduction band to valence band , thereby increase the conduction of the semiconductor .
Semiconductors :
In the semiconductor the energy gap between the valence band and the conduction band is small . this small energy gap allows some electrons to move from the valence band to the conduction band . thus the semiconductor conduct electricity and conductivity increases with increase in temperature .
There are two type of semiconductor : intrinsic semiconductor and extrinsic semiconductor .
Pure semiconducting substances are called intrinsic semiconductor .
The semiconductor obtained by doping are called extrinsic semiconductors.
Extrinsic semiconductor are of two types : n-type semiconductor and p-type semiconductor .
n-type semiconductor is due to metal excess defect and p-type semiconductor is due to metal deficiency defect .
Semiconductors are used in transistors , photo-electric devices and rectifiers .
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Answer:
Carbon group element, any of the six chemical elements that make up Group 14 (IVa) of the periodic table—namely, carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl).
Explanation:
carbon group element, any of the six chemical elements that make up Group 14 (IVa) of the periodic table—namely, carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl).
Answer:
D. Electrons: Negative.
Explanation:
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In this case, by considering the Bohr's atomic model in which atom is composed by a nuclei containing both protons and neutrons which are positively and neutrally charged respectively and surrounding electrons assembled in orbits or levels of energy which are negatively charged in order to provide a balance to the atom, the correct statement is: D. Electrons: Negative. Also consider the Bohr's model on the attached picture.
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Answer:
Explanation:
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In this case, according to the following equation for the calculation of heat in this calorimetry problem:
It is possible for us to calculate to calculate the change in temperature for this process by solving for DT in the aforementioned equation:
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Metals :-
Group 1A - Alkali metals ( highly reactive metals)
Non-metals :-
Group 17 - Halogens ( highly reactive non-metals )