# Modern atomic model

Chemistry Level 1

According to the modern atomic model, what is the electron configuration of $$_{20}\ce{Ca}$$ at the ground state?

(A): $$1s^2 2s^2 2p^4 3s^2 3p^4 3d^6$$

(B): $$1s^2 2s^2 2p^6 3s^2 3p^8$$

(C): $$1s^2 2s^2 2p^6 3s^2 3p^8$$

(D): $$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$$

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