Which group of the periodic table contains two elements that are gasses at stp

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Why are pipes bursting in the in extremely cold weather?