Which element has the ground state electron configuration [Ar]4s²3d1°4p3? A) As B) Br C) Se D) Te E) I

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Chapter1: Chemical Foundations
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**Question:**

Which element has the ground state electron configuration \([Ar]4s^23d^{10}4p^5\)?

**Options:**

- **A)** As
- **B)** Br
- **C)** Se
- **D)** Te
- **E)** I

**Explanation:**

The electron configuration given is \([Ar]4s^23d^{10}4p^5\). 

This indicates the following:

- The element is using argon \([Ar]\) as the core noble gas, which covers the first 18 electrons.
- The next electrons fill the 4s, 3d, and 4p orbitals:
  - 2 electrons in the 4s subshell
  - 10 electrons in the 3d subshell
  - 5 electrons in the 4p subshell

Adding these electrons gives a total of 35 electrons. 

**Answer:**

The element with this electron configuration is **B) Br (Bromine)**.
Transcribed Image Text:**Question:** Which element has the ground state electron configuration \([Ar]4s^23d^{10}4p^5\)? **Options:** - **A)** As - **B)** Br - **C)** Se - **D)** Te - **E)** I **Explanation:** The electron configuration given is \([Ar]4s^23d^{10}4p^5\). This indicates the following: - The element is using argon \([Ar]\) as the core noble gas, which covers the first 18 electrons. - The next electrons fill the 4s, 3d, and 4p orbitals: - 2 electrons in the 4s subshell - 10 electrons in the 3d subshell - 5 electrons in the 4p subshell Adding these electrons gives a total of 35 electrons. **Answer:** The element with this electron configuration is **B) Br (Bromine)**.
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