Within a group, which period, top or bottom is likely to contain atoms with the larger radius?

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

How many liters of water can be produced from 5.0liters of butane gas at stp, assuming excess oxygen? c4h10(g) + 02(g) → co2 (e) + h2o (g)

Which part of the healthcare system could best explain how a pharmaceutical drug works