The Forces That Hold NH₃ Together in the Solid State

question 67

Multiple Choice

The forces that hold NH₃ together in the solid state are

• A)ionic bonds.
• B)dipole-dipole forces and hydrogen bonding.
• C)London dispersion forces only.
• D)covalent bonds.
• E)attractions between nuclei and delocalized valence electrons.

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Definitions:

TOF Timer

A type of PLC timer that measures the "Time-Off-Fall" or the time it takes for a signal to turn from on to off.

Retentive

Memory or functions in a control system that retain their value or state even after the system is powered down or rebooted.

Nonretentive

In PLC programming, a term referring to memory or data that is not retained after power loss.