MTL200 EXAM Questions With Verified
Answers
Wave Mechanics - answerElectron position is based on probability distribution
Bohr Model - answerElectron positon based on discrete paths
3 Additional Bonding types - answerCovalent-ionic, covalent-metallic, metallic-ionic
Polymers - answerlarge comp...
MTL200 EXAM Questions With Verified Answers Wave Mechanics - answer✔✔Electron position is based on probability distribution Bohr Model - answer✔✔Electron positon based on d iscrete paths 3 Additional Bonding types - answer✔✔Covalent -ionic, covalent -metallic, metallic -ionic Polymers - answer✔✔large compound formed from combinations of many monomers They are covalent Metals - answer✔✔Elements that are good conductors of electric current and heat. They are metallic Ceramics - answer✔✔ionic/mixed ionic -covalent intermetallics - answer✔✔mixed metallic -ionic What do proprties of solid materials depend on? - answer✔✔Geomet rical atomic arrangement What is the principle quantum number (n)? - answer✔✔# of atomic shells in Bohr Model What is subsidary quantum number (l) - answer✔✔s,p,d,f (# of subshells within main energy levels magnetic quantum number (m sub l) - answer✔✔spati al orientation of the orbital What is electronegativity? - answer✔✔ability of an atom to attract electrons Electronegative elements - answer✔✔readily acquire electrons to become - ions Electropositive elements - answer✔✔readily give up electrons to become + ions Electronegativity increases from? - answer✔✔left to right, bottom to top Atomic bonding properties depend on? - answer✔✔Interatomic forces that bind atoms together Attractive forces Repulsive forces How are electric dipoles created? How do they int eract with each other - answer✔✔Asymmetrical distribution of electron charge. They interact with each other by electrostatic forces What is a van der Waals bond? - answer✔✔A slight attraction that develops between the oppositely charged regions of nearby m olecules. (the weakest bond) what is a covalent bond? - answer✔✔A chemical bond formed when two or atoms share electrons. What is an ionic bond? - answer✔✔A chemical bond that's formed when an atom transfers and electron to another Atom What is bonding ene rgy? - answer✔✔bonding energy is average of bond energy of each individual bond between two atoms. Crystalline Solid - answer✔✔atoms/ions form a pattern that repeats itself forming crystal -like structures Unit Cell - answer✔✔crystalline small group of atom s that from repetitive patterm Lattice Parameter - answer✔✔size and shape of unit cell Coordination Number (CN) - answer✔✔# ofa toms touching or enar a particular atom (how tightly packed) Atomic weight symbol - answer✔✔A Atomic Packing Factor (APF) - answ er✔✔volume of atoms in unit cell/volume of unit cell area (lattice parameter) of FCC - answer✔✔a=2Rsqrt2 area (lattice parameter) of BCC - answer✔✔a=4R/SQRT3 area (lattice parameter) of HCP - answer✔✔(6SQRT3)R^2 area (lattice parameter) of SCC - answer✔✔2R COORDINATION NUMBER FOR FCC, BCC, HCP, SCC - answer✔✔FCC - 12 BCC - 8 HCP -12 SCC -6
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