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Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine
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The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true
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SDQ SDQ SDQ SDQ SDQ STOP DELETING QUESTIONS KEYONNN...
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