Look at the group numbers (vertical columns) and the number of valence electrons each element has in that group (vertical column). What do you notice?

What are the similarities of physical and chemical change ?

Can someone me with 6 to 10 plz this is for masteries test.

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.