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Which is true of transition metals when moving from left to right on the periodic table? the d sublevels are not filled across the period. the cation radii become larger across the period. atomic radii increase slightly and then start to decrease. atomic radii decrease slightly and then start to increase. o

Which substances have the lowest melting points: ionic covalent, or metallic

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon