Using the Periodic Table A Periodic table is an arrangement of all the elements in order of increasing atomic number. Furthermore, it organizes elements into their chemical families(groups). Use the information below and the periodic table on pp. 304-305 of your text to answer the following questions. I. Write the symbol for each of the following elements. 1. Oxygen__________ II. The number of protons in a stable atom is equal to the number of the atom’s electrons. The number of protons in an atom is the same as the atom’s atomic number(Listed on the periodic table). Atomic number=# of protons The number of protons and neutrons combined equal the atom’s atomic mass or weight as it is often called ( also listed on the periodic chart) . Atomic mass(weight)=# of protons +# of neutrons When using the Atomic Mass listed in the periodic table (in your textbook) round it to a whole number. 2. Nitrogen__________ 3. Hydrogen__________ 4. Helium__________ 5. Sodium__________ ** You can find out what the element is if you know either the atomic number (which is the same number as the number of protons) or the atomic mass (which is the same as protons plus neutrons). 1. This atom has 2 protons and 2 neutrons. What is the atomic mass of the atom?__________ 6. Chlorine__________ What is the atomic number of the atom?__________ 7. Sulfur__________ How many electrons does the atom have?__________ 8. Tin__________ 9. Iron_________ 10. Zinc__________ What is this element?_________________________ (either name or symbol) 2. This atom has 7 protons. Its atomic mass is 14. How many neutrons does this atom have?__________ 11. Calcium__________ How many electrons does the atom have?__________ 12. Potassium__________ What is this element?_________________________ 13. Carbon__________ 14. Silver__________ 15. Mercury__________ 3. This atom has 1 proton. Its atomic mass is 1. How many neutrons does this atom have?__________ How many electrons does the atom have?__________ What is this element?_________________________ 4. This atom has 29 protons and 35 neutrons. What is the atomic mass of the atom?__________ How many electrons does the atom have?__________ What is this element?_________________________ 5. This atom has 82 protons. Its atomic mass is 207. How many neutrons does this atom have?__________ How many electrons does the atom have?__________ What is the atomic number of the atom?__________ What is this element?_________________________ 10. The atomic mass of this atom is 222. It has 86 protons. How many neutrons does this atom have?__________ How many electrons does the atom have?__________ What is the atomic number of the atom?__________ What is this element?_________________________ 11. This atom has 11 protons. What is the atomic mass of the atom?__________ What is this element?_________________________ What is this element?_________________________ 6. This atom has 26 protons. What is the atomic mass of the atom?__________ What is this element?_________________________ 7. This atom has 6 neutrons. Its atomic mass is 12. How many protons does this atom have?___________ What is the atomic number of the atom?__________ What is this element?_________________________ 8. This atom has 79 protons. What is the atom’s atomic mass?__________ How many electrons does the atom have?__________ What is this element?_________________________ 9. This atom has 69 neutrons and 50 protons. What is the atomic mass of the atom?__________ 12. This atom has 14 neutrons. Its atomic mass is 27. How many protons does this atom have?___________ What is the atomic number of the atom?__________ What is this element?_________________________ 13. This atom’s atomic number is 10. How many neutrons does this atom have?__________ What is the atomic mass of the atom?__________ What is this element?_________________________ 14. This atom has 20 protons and 20 neutrons. What is the atomic mass of the atom?__________ What is this element?_________________________ 15. This atom has an atomic mass of 210. It has 125 neutrons. How many protons does this element have?__________ What is the atomic number of the atom?__________ How many neutrons does this atom have?____________ How many electrons does the atom have?__________ What is this element?_____________