Which of the Following Elements Are Found as Covalent Network

question 50

Multiple Choice

Which of the following elements are found as covalent network solids?
I.beryllium, Be
II.carbon, C
III.phosphorus, P
IV.sulfur, S

• A)I and II
• B)I and III
• C)II and III
• D)II and IV
• E)III and IV

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Definitions:

Anode

The electrode in an electrochemical cell at which oxidation occurs, electrons are released, and positive current flows into the device from the external circuit.

Phenylalanine

An essential amino acid with the formula C9H11NO2, known for its role in the biosynthesis of proteins and a precursor to neurotransmitters.

pH

A numeric scale used to specify the acidity or basicity of an aqueous solution, with values less than 7 being acidic and greater than 7 being basic.

Isoelectric Point

The pH at which a molecule or surface carries no net electrical charge, important in protein purification and characterization.