3, Na, Mg, Al, Si, P, S, Cl, Ar. 4, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr. 5, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te ...
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WHAT TO DO WITH THE QUESTION.....
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sodium
magnesium
aluminium
silicon
phosphorus
sulphur
chlorine
argon
potassium
calcium
titanium
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