Chemistry•Easy

Electron Configuration

Chemistry challenge: Electrons fill atomic orbitals following three rules: Aufbau principle, Pauli exclusion principle, and Hund's rule.

Scenario

You need to write electron configurations for elements and answer questions about atomic structure and orbital filling.

Question 1

What is the correct electron configuration for Carbon (Z = 6)?

1s² 2s⁴1s² 2s² 2p²1s² 2p⁴1s⁴ 2s²

Question 2

How many unpaired electrons does a carbon atom have in its ground state?

electrons

Question 3

Which element has the electron configuration [Ar] 3d¹⁰ 4s²? (Ar = 18)

Copper (Cu)Zinc (Zn)Calcium (Ca)Iron (Fe)

Question 4

The maximum number of electrons in the n = 3 shell is:

electrons

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