To determine the number of electrons in 3 molecules of hydrogen peroxide (H₂O₂), we first find the number of electrons in one molecule. Each hydrogen (H) has 1 electron, and each oxygen (O) has 8 electrons. Therefore, one H₂O₂ molecule has 2(1) + 2(8) = 18 electrons. Thus, 3 H₂O₂ molecules contain 3 × 18 = 54 electrons.
20 electrons
42 electrons
Two electrons from each element are shared; the total is four electrons.
6 valence electrons
3 valence electrons
8 electrons
16 electrons
20 electrons
6 electrons
97 electrons
4 electrons.
4 electrons, 2 valence electrons
There are 16 electrons in an O2 molecule. Each oxygen atom contributes 8 electrons, totaling 16 electrons in the molecule.
Germanium has 32 electrons.
Xenon has 54 electrons.
Argon has 18 electrons.
15 total electrons, 3 valence electrons