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Download Day 2 – Worksheet Atoms and The Periodic Table
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Name: _____________________________________ Date: ________________________________ Chemistry 11 - Review Atoms and The Periodic Table Worksheet 1. Define chemistry. 2. Define atom. 3. The three parts of an atom and their respective charges are : 4. The atomic number of an atom tells you the number of ____________________. If the atom is neutral the atomic number also gives the number of ____________________. No two elements will have the ____________________ atomic number. 5. The atomic mass of an atom can be used to determine the number of ____________________. First ____________________ the atomic mass and then complete the following equation: # of Neutrons = ____________________ – ____________________. Use your periodic table to complete the following: 6. Give the symbol and number of protons in one atom of: Lithium ____________________ Bromine ____________________ Iron ____________________ Copper ____________________ Oxygen ____________________ Mercury ____________________ Krypton ____________________ Helium ____________________ 7. Give the symbol and number of electrons in a neutral atom of: Uranium ____________________ Chlorine ____________________ Boron ____________________ Iodine ____________________ Antimony ____________________ Xenon ____________________ 8. Give the symbol and number of neutrons in one atom of: Barium ____________________ Bismuth ____________________ Carbon ____________________ Hydrogen ____________________ Fluorine ____________________ Magnesium ____________________ Mercury ____________________ Europium ____________________ 9. Name the element which has the following number of particles: 26 electrons, 29 neutrons, 26 protons ____________________ 53 protons, 74 neutrons ____________________ 2 electrons (neutral atom) ____________________ 20 protons ____________________ 0 neutrons ____________________ 10. If you know only the following information, can you always determine what the element is? Yes or no? Number of protons ____________________ Number of neutrons ____________________ Number of electrons in a neutral atom ____________________ Number of electrons ____________________
