# What is the electron configuration of the first 20 elements?

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science
chemistry

The following table summarizes the ground state

ATOMIC STRUCTURE. 3.4 -

**electron configuration of the first 20 elements**on the periodic table.ATOMIC STRUCTURE. 3.4 -

**Electron Configurations**of Atoms.Name | Atomic Number | Electron Configuration |
---|---|---|

Argon | 18 | 1s^{2} 2s^{2}2p^{6}3s^{2}3p^{6} |

Period 4 | ||

Potassium | 19 | 1s^{2} 2s^{2}2p^{6}3s^{2}3p^{6}4s^{1} |

Calcium | 20 | 1s^{2} 2s^{2}2p^{6}3s^{2}3p^{6}4s^{2} |

Beside this, what is the electron configuration of all elements?

Electron Configuration for All Elements in the Periodic Table

Element | Electrons | Electronic Configuration |
---|---|---|

Aluminum (Al) | 13 | 1s^{2} 2s^{2} 2p^{6} 3s^{2}3p^{1} |

Silicon (Si) | 14 | 1s^{2} 2s^{2} 2p^{6} 3s^{2}3p^{2} |

Phosphorous (P) | 15 | 1s^{2} 2s^{2} 2p^{6} 3s^{2}3p^{3} |

Sulfur (S) | 16 | 1s^{2} 2s^{2} 2p^{6} 3s^{2}3p^{4} |

**Hydrogen**(

**H**)

**Helium (He**) Lithium (Li)

Likewise, what is the electron configuration for BE?

[He] 2s2

**Hund's Rule**. **Hund's rule**: every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.