Question

write all the elements and their electronic configuration period 2​

Answer 1

Explanation:

The second period contains the elements lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon. This situation can be explained by modern theories of atomic structure. In a quantum mechanical description of atomic structure, this period corresponds to the filling of the 2s and 2p orbitals. Period 2 elements obey the octet rule in that they need eight electrons to complete their valence shell. The maximum number of electrons that these elements can accommodate is ten, two in the 1s orbital, two in the 2s orbital and six in the 2p orbital.

Chemical element  Electron configuration

3 Li Lithium  [He] 2s1

4 Be Beryllium [He] 2s2

5 B Boron  [He] 2s2 2p1

6 C Carbon  [He] 2s2 2p2

7 N Nitrogen  [He] 2s2 2p3

8 O Oxygen  [He] 2s2 2p4

9 F Fluorine  [He] 2s2 2p5

10 Ne Neon  [He] 2s2 2p6

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Answer 2

Answer:

Chemical element  Chemical series Electron configuration

3 Li Lithium   Alkali metal                [He] 2s1

4 Be Beryllium   Alkaline earth metal  [He] 2s2

5 B Boron    Metalloid                [He] 2s2 2p1

6 C Carbon    Reactive nonmetal       [He] 2s2 2p2

7 N Nitrogen   Reactive nonmetal [He] 2s2 2p3

8 O Oxygen   Reactive nonmetal [He] 2s2 2p4

9 F Fluorine   Reactive nonmetal [He] 2s2 2p5

10 Ne Neon   Noble gas