Use the References to access important values if needed for this question. What is the atomic number for the element that is in group IIA(2) and period 4 ? Atomic number = What is the atomic number for the element that is in group IIIA(13) and period 3 ? Atomic number = What is the atomic number for the element that is in group VB(5) and period 4 ? Atomic number = What is the atomic number for the element that is in group IIA(2) and period 3 ? Atomic number = 9 more group attempts reruaining Use the References to access important values if needed for this question. What is the symbol for the element that is in group IIA(2) and period 4 ? What is the symbol for the element that is in group IIIA(13) and period 5 ? What is the symbol for the element that is in group IB(11) and period 4? What is the symbol for the element that is in group IIA(2) and period 2? 9 more group attempts remaining Use the References to access important values if needed for this question. The formula for sulfur trioxide is SO3. a. How many grams of sulfur are present in 4.33 moles of sulfur trioxide? grams b. How many moles of oxygen are present in 4.10 grams of sulfur trioxide? moles 9 more group attempts remalning Use the References to access important values if needed for this question. The formula for dinitrogen tetroxide is N2O4. a. How many grams of nitrogen are present in 1.48 moles of dinitrogen tetroxide? grams b. How many moles of oxygen are present in 3.30 grams of dinitrogen tetroxide? moles 9 more group attempts remaining Use the References to access important values if needed for this question. a. How many moles of oxygen atoms are present in a sample that contains 4.33 moles of dioxygen difluoride, O2F2 ? molO b. How many moles of O2F2 molecules are present in a sample that contains 7.47 moles of oxygen atoms? mol O2F2 9 more group attempts remaining