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Answer 1 · 2017-06-14T15:47:53

$10$ Electrons Per Molecule of Water

One water molecule has a total of 10 protons and 10 electrons (8 from the oxygen atom and 1 from each of the two hydrogen atoms).

$H_2O$

$darr$

Hydrogen $(H_2):$ atomic number $1,$ but of $2$ atoms

$2 xx 1 = 2$

Oxygen $(O):$ atomic number $8,$ but of $1$ atom

$1 xx 8 = 8$

Electron $= 2 + 8 = 10$