Atomic weight is the weighted average of the atomic masses of an atom's naturally occurring isotopes -
True
The smaller the principal quantum number, the higher the energy level. - False
Bonding energy is the energy required to separate two atoms that are chemically bonded to each other.
- True
Ionic bonding is bidirectional. - False
How many atoms are in a FCC - 4
How many atoms are in a BCC - 2
Edge length BCC - 4r/sqrt(3)
Edge length FCC - 2sqrt(2)r
Packing Efficiency BCC - 68%
Packing Efficiency FCC - 74%
Packing Efficiency Hexagonal Cell - 74%
In the section of crystallography directions and planes, the braces {} indicate a family of equivalent
directions. - True
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