Lithium Sodium
Francium
Chlorine

Which element has the smallest atomic radius?

Which element has the largest atomic radius?

Which element is the most reactive?

Why?

Which element has the highest electronegativity?

Which element is most likely to give en electron?

Which element is most likely to receive an electron

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Answershe should not have multiplied the sulfur atoms by the subscript 4