PPT-Element Symbol # of protons

of neutrons of electron Atomic Mass Oxygen 8 8 16 Silicon Si 14 14 28 Aluminum Al 14 13 13 Iron 26 56 Ca 20 20 40 Bellwork Wednesday 2222012 1 Turn in Pink

periodic metals group table metals periodic table group elements atomic properties valence earth amp mass conductors number heat bellwork

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