Question

which best describes why nh₄⁺ can form an ionic bond with cl⁻?
its outermost shell gains one or more electrons from cl⁻.
its positive charge is attracted to the negative charge of cl⁻.
it has a negative charge that is spread over the entire ion.
it has a nitrogen atom that is strongly attracted to cl⁻.

Explanation:

离子键是由带相反电荷的离子之间的静电吸引力形成的。$\ce{NH_{4}^{+}}$带正电荷，$\ce{Cl^{-}}$带负电荷，它们之间的静电吸引符合离子键形成的条件。

• 选项1：$\ce{NH_{4}^{+}}$是阳离子，不会从$\ce{Cl^{-}}$获得电子，而是通过静电吸引结合。
• 选项3：$\ce{NH_{4}^{+}}$带正电荷，不是负电荷。
• 选项4：$\ce{NH_{4}^{+}}$与$\ce{Cl^{-}}$形成离子键是因为电荷吸引，不是因为氮原子的吸引。

Answer:

Its positive charge is attracted to the negative charge of $\ce{Cl^{-}}$.