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Download Unit 2 A Study Guide Atoms and the Periodic Table • What are the
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Unit 2 A Study Guide Atoms and the Periodic Table • • • • • • • • • • What are the parts of the atom? What are the charges on each part? How I calculate the atomic mass of an atom? How do I find the atomic number on the periodic table? Using the periodic table, how can I tell protons, neutrons, and electrons? How is the periodic table arranged? What are the rows and columns also known as? What is true about all the elements in a column? What are the names of the elemental groups? (Ex what is column 1 called, column 17, columns 3-12?) What are ions and isotopes and how are they different than “normal” atoms of an element? Ions • • • • • • • • • Explain how to figure out the charge of ions using the periodic table? What is the charge for ions from group 1? 3? 15? 17? What does a Lewis dot structure show? Draw the Lewis dot structure for Sr and As. What is the charge for Sr and As? What is the outermost layer of electrons called? What is the octet rule (what is the magic number)? How does it relate to bonding? How are ionic and covalent bonds different? What are monoatomic ions compared to polyatomic ions? Formulas • • • • • • • • • What information can I get from empirical, molecular, and structural formulas? When would I use each type of formula? How can I tell the difference between ionic, molecular, and acidic formulas? Draw the flow chart used for identifying formulas. What do I do with the charges of two ions in order to get the formula for the ionic compound? Which ion is written first in an ionic formula? Name the following: o SrI2 o Ni(NO3)2 o Pb(OH)2 Write the formula for the following: o chromium (II) nitrate o magnesium phosphate o sodium phosphate When do I use Roman numerals and when do I use prefixes? • • • • What do the prefixes mean? mono- , di- , tri- , etc.? What are binary and ternary formulas? Name the following: o P4S5 o Si2Br2 o CH4 Write the formula for the following: o dinitrogen dioxide o iodine pentafluoride o hexaboron silicide
