Complete the following statement: As you move a group on the periodic table, metals become reactive.

3. Explain why this occurs.

Iknow #2 is d. i just need to know why

May someone me with these science questions

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.