B. Example Calculations
1) What is the mass number of O?
16
2) What is the mass number of Be?
9
3) Based on the periodic table, how many neutron's are in Ga?
39
4) What element had the atomic number of 6?
C
5) Iodine is 80% 127^I,, 17% 126^I, and 3% 128I. Calculate the average atomic mass of iodine.
126.86
6) Hydrogen is 99% 1^H 0.8%, 2^H, and 0.2% 3^H. Calculate its average atomic mass.
1.012
16
2) What is the mass number of Be?
9
3) Based on the periodic table, how many neutron's are in Ga?
39
4) What element had the atomic number of 6?
C
5) Iodine is 80% 127^I,, 17% 126^I, and 3% 128I. Calculate the average atomic mass of iodine.
126.86
6) Hydrogen is 99% 1^H 0.8%, 2^H, and 0.2% 3^H. Calculate its average atomic mass.
1.012