Sagot :
Answer:
11 (Na) Sodium ------- [Ne]3s¹
12 (Mg) Magnesium------[Ne] 3s²
13 (Al) Aluminium --------[Ne] 3s²3p¹
14 (Si)Silicon---------- [Ne]3s²3p²
15 (P) Phosphorus------[Ne]3s²3p³
16 (S) Sulfur--------[Ne] 3s²3p⁴
17 (Cl) Chlorine -------[Ne] 3s²3p5
18 (Ar) Argon---------- [Ne] 3s²3p6
Explanation:
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