Font size
WorksheetsCRYSTALLINE AND SOLID STATE_2
Total questions: 15
Worksheet time: 43mins
An extra atom present in the void between atoms is called "vacancy"
True
False
A defect where atoms occupy the empty space between existing atoms within a crystal
Interstitial Defect
Frenkel Defect
Vacancy Defect
Schottky Defect
Define Schottky defect.
When an atom occupies a definite position in the lattice that is not normally occupied in the perfect crystal.
An atom is missing from its regular atomic site.
An ion displaced from a regular site to an interstitial site in ionic crystal.
A pair of one cation and one anion missing from regular sites in ionic crystal.
Arise due to cationic vacancies. It occurs when positive ions are missing from its crystal lattice.
To maintain electrical neutrality, one of the nearest metal ion acquires two positive charge.
The above statement describe about
Metal Deficiency defect
Metal excess defect due to anionic vacancies.
Metal excess defect due to extra cations
Metal addition defect
Materials which can conduct electricity better than insulator, but not as well as conductors represent ___________
superconductor
semiconductor
diode
graphite
Intrinsic semiconductors are those
Which are made of semiconductor material in its purest form
Which have high conductivity
Which have more holes than electrons
Which have more electrons than holes
The process of adding an impurity to an intrinsic semiconductor is called
Atomic modification
Ionization
Recombination
Doping
These are the characteristics of Trivalent impurities except
3 valence electrons
producing a "hole"
produce p-type semiconductors
Antimony, arsenic, and phosphorus are the examples
Choose the statements that describe P-Type semiconductor. You may choose more than one answer.
The addition of trivalent impurities such as boron, aluminum or gallium.
Known as Donor Impurities.
The charge carrier is effectively a positively charged hole.
The addition of pentavalent impurities (atoms with 5 Ve-) such as antimony, arsenic or phosphorous
Identify the n-doped semiconductor.
What term is used to describe this model of metallic bonding?
Electron sea model
VSEPR
Valence Bond Theory
Molecular Orbital Theory
Explain why Magnesium has a higher melting point (650 °C) than sodium (97.79 °C)
CONDUCTION BAND is
the energy difference between the valence and conduction band.
band of orbitals that are filled or partially filled by valance electron.
unoccupied bands in which electron are free to migrate.
lower MOs are occupied by valence e-
Valence band overlapped with the conduction band. This statement refer to:
Insulator
Conductor
Semiconductor
Diode
Current flows occur when
electrons move from conduction band to valence band
electrons move from valence band to conduction band
