Atoms and Isotopes Worksheet PDF

Name _________________________________ Period _________ Date _____________ Atoms and Isotopes Worksheet Fill in the table with the correct information Isotope Isotope notation Atomic # Protons Electrons neutrons Oxy...

Name _________________________________ Period _________ Date _____________ Atoms and Isotopes Worksheet Fill in the table with the correct information Isotope Isotope notation Atomic # Protons Electrons neutrons Oxygen-16 16 8 8 8 8 8 O Bromine-80 80 35 35 35 45 35 Br Uranium-235 235 92 92 92 143 92 U Copper-64 29 29 29 35 64 29 Cu 1. Describe the general arrangement of subatomic particles in the atom Electrons surround the nucleus; protons and neutrons are in the nucleus. 2. What contribution did these scientists make to atomic models of the atom? a. Dalton 1st atomic theory b. Thomson- electron c. Rutherford- nucleus 3. What is the isotope notation of the element that has an atomic number of 24 and a mass number of 52. 4. What part of the atom contains practically all its mass? nucleus 52 5. How do the isotopes of an element differ? How are they the same? They have different #s of neutrons; same number of protons 24 Cr 6. Which element contains the largest number of neutrons per atom? a. Bismuth-210 b. Polonium-210 c. Astatine-210 d. Astatine-211 7. Fill in the following table Isotope Isotope Not Atomic # Protons Electrons Neutrons Nickel-58 58 Ni 28 28 28 30 28 Phosphorus-30 30 15 15 15 15 15 P Iodine-127 127 53 53 53 74 53 I Krypton-84 84 Kr 36 36 36 48 36 Selenium-79 79 Se 34 34 34 45 34 Calcium-40 40 20 20 20 20 20 Ca Chlorine-37 37 Cl 17 17 17 20 17 8. Calculate the average atomic mass of chlorine if its isotopes and % abundance are as follows. Show work. Mass of Isotope % abundance 36.96590 24.47 (.2447)(36.96590) = 9.04556 34.96885 75.53 (.7553)(34.96885) = 26.41200 35.4575amu