Examine the trend in atomic radius from left to right across a period by clicking on all the elements in the 2nd period. List their atomic radii below (pm = picometer or 1 x 10-12 m).

If 4.8 moles of x and 3.4 moles of y react according to the reaction below, how many moles of the excess reactant will be left over at the end of the reaction? 3x + 2y “yields”/ x3y2. a. 1.7 mol y left over b. 1.6 mol x left over c. 0.2 mol y left over d. 0.1 mol x left over