Sodium is the reducing agent because a reducing agent is always the donor of electrons.
The most appropriate answer is B !!
Covalent bond is formed by sharing of electrons !!
Carboxylic acid...........
The answer is: "FOUR (4)" .
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Answer:ionic
Explanation: ionic bond formation
In the ionic bond formation between calcium and sulfur, a calcium atom donates two valence electrons to a sulfur atom to form a Ca2+ ion and an S2+ ⁻ ion.