True. The d block shells are always n-1. f shells (lanthanides and actinides) are n-2 shell number.
Answer:
C. hydrogen bonding
Explanation:
Ammonia and hydrogen fluoride are both able to exhibit hydrogen bonding due to containing nitrogen (in ammonia) and fluoride (obviously in hydrogen fluoride). Remember the unique qualities of NOF. :)
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Most reasonable answer:
Observations and experimentation
