1.

Write the name of all elements thier symbols and thier valencies ​

Answer»

tion:NUMBER SYMBOL ELEMENT VALENCE1 H Hydrogen 1, 0, -12 He HELIUM 03 Li Lithium 1, -14 Be BERYLLIUM 25 B Boron 3, 2, 16 C Carbon 4, 3, 2, 1, -1, -2, -47 N Nitrogen 5, 4, 3, 2, 1, 0, -1, -2, -38 O Oxygen 2, 1, 0, -1, -29 F Fluorine 0, -110 Ne NEON



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