Which electron configuration BEST represents Calcium?*1 pointOption 1Option 2Option 3Option 4

To determine the best electron configuration for Calcium (Ca), we should start by knowing its atomic number.

Atomic Number of Calcium

1. The atomic number of Calcium is 20, which means it has 20 electrons.

Electron Configuration

1. The electron configuration for Calcium can be constructed by filling the orbitals according to the Aufbau principle, Hund's rule, and the Pauli exclusion principle:
   • 1s² 2s² 2p⁶ 3s²

Valid Options

Based on the standard electron configuration, we might see the options as:

• Option 1: 1s² 2s² 2p⁶ 3s²
• Option 2: 1s² 2s² 2p⁶ 3s² 3p²
• Option 3: 1s² 2s² 2p⁶ 3s² 4s²
• Option 4: 1s² 2s² 2p⁶ 4s²

Conclusion

The correct configuration that best represents Calcium is:

• 1s² 2s² 2p⁶ 3s²

Please select Option 1 if it corresponds to that configuration.