When drawing Lewis dot structure, count the valence electrons of each element in the structure and the total valence electrons of the compound.
H → Group 1A → 1 valence e- x 2
S → Group 6A → 6 valence e-
O → Group 6A → 6 valence e- x 3
Total valence e- → 26 e-
Complete the Lewis dot structure for H2SO3 (in which H is bonded to O).
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