1) Will lithium replace copper? a) yes b) no 2) Will magnesium replace potassium? a) yes b) no 3) Will tin replace zinc? a) yes b) no 4) Will barium replace sodium? a) yes b) no 5) Will calcium replace aluminum? a) yes b) no 6) Will cobalt replace cadmium? a) yes b) no 7) Will lead replace platinum? a) yes b) no 8) Will bromine replace chlorine? a) yes b) no 9) Will sulfur replace fluorine? a) yes b) no 10) Will oxygen replace iodine? a) yes b) no

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