Which transition metal is known for forming complex ions with a coordination num

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Question: Which transition metal is known for forming complex ions with a coordination number of 6?

Options:

Correct Answer: Cobalt

Solution:

Cobalt commonly forms complex ions with a coordination number of 6, such as in [Co(NH3)6]3+.

Which transition metal is known for forming complex ions with a coordination number of 6?

Which transition metal is known for forming complex ions with a coordination number of 6?

Step 1: Understand what a transition metal is. Transition metals are elements found in the middle of the periodic table, known for their ability to form various compounds.
Step 2: Learn about complex ions. A complex ion is a charged species consisting of a central metal atom or ion bonded to surrounding molecules or ions called ligands.
Step 3: Know what coordination number means. The coordination number is the number of ligands that are bonded to the central metal atom in a complex ion.
Step 4: Identify the common coordination number of 6. Many transition metals can form complex ions with a coordination number of 6, meaning they can bond with 6 ligands.
Step 5: Recognize cobalt as a transition metal that forms complex ions with a coordination number of 6. An example is the complex ion [Co(NH3)6]3+, where cobalt is surrounded by 6 ammonia (NH3) ligands.

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