Chemistry-4-chemistry-atoms-first-burdge-atoms-1st-122-ch-2-atoms-and-the-periodic-table-6807.pdf

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CHEMISTRY - BURDGE-ATOMS 1ST 2ECH.2 - ATOMS AND THE PERIODIC TABLE
CONCEPT:GROUP NAMES AND CLASSIFICATIONSEver wonder where did this periodic table ever come from?At the end of the 18thcentury, Lavoisier compiled a list of the 23 elements known at the time.In 1869, Dmitri Mendeleev coined the term “Periodic Table” .Today the total is 114 and still counting!Now, to understand chemistry fully it will be imperative that you memorize and learn the different portions of the PeriodicTable.Phase DifferencesAt room temperature (between 20oC to25oC), all elements are_______________except:Mercury and bromine are_______________ .Hydrogen, Nitrogen,Oxygen, Fluorine, Chlorine and the Noble Gases are____________.CHEMISTRY - BURDGE-ATOMS 1ST 2ECH.2 - ATOMS AND THE PERIODIC TABLEPage 2
CONCEPT:CHARGE DISTRIBUTIONS OF THE PERIODIC TABLEA majority of the elements on the periodic table are reactive because they all want to be like the_____________________.They have the perfect number of electrons in their outer atomic shells.1. Metals tend to__________electrons to become positively charged ions called_____________Metals that haveONLYone charge are referred to as________________metals.Metals that haveMORE THANone charge are referred to as________________metals.2. Nonmetals tend to__________electrons to become negatively charged ions called_____________..CHEMISTRY - BURDGE-ATOMS 1ST 2ECH.2 - ATOMS AND THE PERIODIC TABLEPage 3
CONCEPT:ELEMENT SYMBOLSSome of the names and symbols for the elements are easy to recognize like Aluminum is Al, but some others aren’t.EXAMPLE 1:Identify the elements by their given symbols.a.Aub.Hgc.Pbd.Fee.AgSome elements exist in nature connected to their exact double.We call these chemicalSiamese twins________________________________.To recall them just remember this funny phrase:HaveNoFearOfIceColdBeerSome elements exist in nature asmonoatomic elementssuch as_______________&_______________Some elements exist in nature aspolyatomic moleculessuch as_______________&_______________..CHEMISTRY - BURDGE-ATOMS 1ST 2ECH.2 - ATOMS AND THE PERIODIC TABLEPage 4
CONCEPT:MASS CONVERSIONSThe_______________is the chemical unit for the amount of a substance.One mole (1 mol) contains 6.022 x 1023entities, which is known as _________________________________________.Entities means______________________ , ______________________or______________________.We use______________________when dealing with a single, individual element.We use_________________or_________________when dealing with more than one element or a compound.6.022 x 1023atoms of Feis equal to1 mole of Feand has a mass of55.85 amuAtomsMolesGramsEXAMPLE:Determine the mass (in grams) found in 7.28 x 1028nitrogen atoms.6.022 x 1023molecules of H2Ois equal to1 mole of H2Oand has a mass of18.016 amuMoleculesMolesGrams

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