Which statement correctly describes the actual yield and the theoretical yield of a reaction? the actual yield is calculated from the reactant amounts, but the theoretical yield must be measured for each instance of a reaction. the actual yield is calculated from the amount of the limiting reactant, and the theoretical yield is calculated from the amount of the excess reactant. the actual yield depends on the reaction conditions, but the theoretical yield varies only with reactant amounts. the actual yield represents the maximum yield possible, and the theoretical yield assumes perfect reaction conditions.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

i would say b

explanation:

but i think i would need more information than that