Which Ground-State Electron Configuration Is Incorrect

question 73

Multiple Choice

Which ground-state electron configuration is incorrect?

• A) Br: [Ar]3d¹⁰4s²4p⁵
• B) K: [Ar]4s¹
• C) Ni: [Ar]3d⁵
• D) Mg: 1s²2s²2p⁶3s²
• E) Co: [Ar]3d⁷4s²

---

Definitions:

Income Elasticity

A measure of how much the demand for a good or service changes in response to changes in the consumer's income.

Midpoint Method

A technique used to calculate the percentage change between two values, avoiding the problem of path dependency by using the average of the initial and final values as the base.

Normal Goods

Goods for which demand increases as the income of individuals increases.