Why does sulfur have 6 valence electrons, not 16?
Sulfur has 16 total electrons but only 6 that do chemistry. Learn where those 6 live and how the periodic table reveals them.
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1 lesson for “Valence electrons”
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Does sodium share its electron with chlorine?
NaCl is table salt, but is it held together by sharing or by moving an electron? Trace the transfer and the attraction.
Try this lessonWhen two nonmetals meet, do they share or transfer?
Hydrogen cannot pull an electron away from hydrogen, so the two atoms do something smarter: they share. Count the pairs.
Try this lessonWhy isn't the mass number just the neutrons?
An atom with 17 protons and 18 neutrons: is its mass number 35 or 18? And what is its charge? Work through the counting rules one blank at a time.
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