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ElementSymbol # of protons # of neutrons # of electron Atomic # Mass # Oxygen8816 SiliconSi141428 AluminumAl141313 Iron2656 Ca202040 BELLWORK: WEDNESDAY.

ElementSymbol # of protons # of neutrons # of electron Atomic # Mass # Oxygen8816 SiliconSi141428 AluminumAl141313 Iron2656 Ca202040 BELLWORK: WEDNESDAY.

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