Which of the following configurations represents a transition metal?

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Question: Which of the following configurations represents a transition metal?

Options:

Correct Answer: [Kr] 5s2 4d5

Solution:

The configuration [Kr] 5s2 4d5 represents Molybdenum (Mo), a transition metal.

Which of the following configurations represents a transition metal?

Which of the following configurations represents a transition metal?

Step 1: Understand what a transition metal is. Transition metals are elements that have partially filled d orbitals.
Step 2: Look at the given electron configuration: [Kr] 5s2 4d5.
Step 3: Identify the parts of the configuration. [Kr] represents the electron configuration of Krypton, which accounts for the first 36 electrons.
Step 4: The '5s2' means there are 2 electrons in the 5s orbital.
Step 5: The '4d5' means there are 5 electrons in the 4d orbital.
Step 6: Count the total number of electrons: 36 (from Kr) + 2 (from 5s) + 5 (from 4d) = 43 electrons.
Step 7: The element with 43 electrons is Molybdenum (Mo).
Step 8: Check if Molybdenum is a transition metal. Yes, it is because it has a partially filled d orbital (4d5).

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