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CREDITS: returnofthestudysheet 1)_____________ is the smallest particle of an element that retains its properties 2) the 3 particles of an atom are ____________, ____________, ____________, with charges ____________, ____________,____________ respectively 3) the number of ____________ determines which element it is 4) The ____________ and ____________ are located in the nucleus 5) The charge of a proton and electron are respectively +/- ____________ 6) These two are almost the same size: ____________ and ____________ 7) Mass number is _________________________________________________________________ 8) Atomic number is ____________________________________________ 9) # of protons = _______________________________________ 10) Atomic mass is the __________________________________________________________________ 11) Isotopes are diff. forms of the same element that have the same number of ____________ (____________) but a diff amount of ____________ in their nucleus, therefore having diff ____________ 12) Atomic Mass: _____________ *______________ (repeat) Give the number of protons in all of the following Krypton _________________ Copper ___________________ Hydrogen __________________ Sodium ____________________ Bromine ___________________ Iron ________________________ Give the number of electrons in an atom of the following: Potassium ____________________ Boron _____________________ Iodine _____________________ Uranium __________________ 1 CREDITS: returnofthestudysheet Give the number of neutrons in one atom of the following: You can do this by _______________________________ Fluorine ________________ Boron ___________________ Magnesium ________________ Silver _____________________ Fill out the table Isotope name Nuclear symbol Atomic number Mass number # of protons 201 80 # of electrons # of neutrons Calcium -40 197/79Au 17 18 26 30 The number after the isotope name is the ________________ __________________________________ Nuclear symbol: The top number is the ________________ __________________________________ The bottom number is the ________________ __________________________________ Mass is measured in __________ Mass is in u? idk Calculate the following 1) C-12 has a nat. abundance of 98.89% and C-13 has a nat. abundance of 1.11% , the mass of C-12 is 12.000u (amu) ; the mass of C-13 is 18.0003 u, how do we calculate the atomic mass? __________________________________ 2) Calculate the avg atomic mass for neon if its nat abundance is 90.5% neon- 20 and 0.3% neon- 21 , and 9.2% neon 22 2 CREDITS: returnofthestudysheet __________________________________ DON’T FORGET TO PUT PERCENT IN DECIMAL FORM (divide by 100!!!) 3) Calculate the avg atomic mass of silver if 13 out of 25 atoms are silver-107 and 12 of 25 atoms are silver -109 __________________________________ Work with the following isotopes: 12/6 C 13/6 C 14/6 C (write out here ) 1) The element is ____________________ 2) The number 6 is the ____________________ 3) The numbers 12, 13, 14 are ____________________ 4) How many protons & neutrons are in each isotope ____________________ ____________________ ____________________ 1) Give the number of protons (p), electrons (e), and neutrons (n) in one atom of chlorine-37. ______________ 2) An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? _____________ 3) How many neutrons are there in an atom of lead whose mass number is 208? ______________ 4) Atoms of the same element with different mass numbers are called ______________ 5) How many protons and electrons are present in one Br– ion? ______________ 6) An oxide ion, O2–, has ______________ 3 CREDITS: returnofthestudysheet 7) A magnesium ion, Mg2+, has ______________ Solve these , show work 1) The nat abundance for boron isotopes is 19.9% (10.013 amu) and 80.1 % B-11 (11.009 amu) . Calculate the atomic mass of boron ______________ 2) Calculate the mass of silicone using the following data for percent nat abundance and mass of each isotope 92.23% si 28 (27.9769 amu) ; 4.67% si- 29 (28.9765); 3.10% si- 30 (29.9738 amu) ______________ 3) Magnesuim consists of 3 isoptopes with masses of 24 (78.5%), 25 (10%), and 26 (11.5%) . what is the atomic mass of magnesium? ______________ 4) Thallium has two stable isotopes 203Ti and 205Ti . Knowing that the atiomic mass of taillium is 204.4, which isotope is the more abundant of the two ______________ abundant mass is the _________________ mass __________________________________ Fill out the chart Atoms quickly loose of gain ______________ If electrons are added or removes, the result is an ______________ 4 CREDITS: returnofthestudysheet An ion with pos. charge is ______________ An ion with neg charge is an ______________ Symbol Name Type? more or less e than atom Number of e gained or lost Na+ FCr3+ S2Co2+ I- Chemical reactions In a chemical reaction The symbol “+” represents ________________________ The arrow points to the _______________________________________ Left of arrow: ______________ ____________ ; Right of arrow ________________________ numbers: __________________________ Atoms are neither created nor destroyed!!! When balancing equations, ______________ should NEVER be changed _ Balance these [: 1) S₈+O₂ SO₃ ______________ 2) Na+H₂O NaOH + H₂ _______________ 3) FeS₂+O₂Fe₂O₃+SO₂ _______________ 4) SiCl₄ + H₂O H₄SiO₄ +HCl _________________ 5) CO₂ + NH₃ OC (NH₂)₂ + H₂0 _________________ 6) Al (OH)₃ + H₂SO₄ Al₂ (SO₄)₃ + H₂O _________________ 5 CREDITS: returnofthestudysheet 7) Fe₂(SO₄)₃+KOH K₂SO₄ + Fe(OH)₃ __________________ 8) H₂SO₄ + HIH₂S+ I₂ + H₂O _________________ 9) C₇H₁₆ +O₂ CO₂ + H₂ _________________ 10) C₃H₈ + O₂ CO₂ + H₂O _________________ 11) Fe₂O₃ + CO Fe + CO₂ _________________ 12) PCl₅ + H2O HCl + H₃PO₄ __________________ 13) Fe + H₂O Fe₃O₄ + H₂ __________________ 14) Al + O₂ Al₂O₃ __________________ 15) Al₂(SO₄)₃ + Ca(OH)₂ Al (OH)₃ + CaSO₄ ____________________ 16) FeCl₃ + NH₄OH Fe(OH)₃ + NH₄Cl ___________________ 17) Ca₃(PO₄)₂ + 6 SiO₂ P₄O₁₀ + CaSiO₃ ___________________ 18) N₂O₅ + H₂O HNO₃ ___________________ 19) Al + HCl AlCl₃ + H₂ ______________________ 20) H₃BO₃ H₄B₆O₁₁ + H₂ _______________________ 6 CREDITS: returnofthestudysheet Fill in the blanks and label : 1) This reaction breaks things down. Single compound broken down into 2 or more products: _____________. It is in the form _____________ This reactions unites 2 things to make a new thing: ____________. It is in the form _____________ 2) One element replaces another in a reaction_____________ . It’s in the from _____________ _________________________________________ 3) Switching of partners in a reaction: _____________. It’s in the form: _____________ 4) A COMBUSTION REACTION is in the form of __________________________________ Label these by the type of reaction that they are 1. HgOHg+O₂ ________________________________ 2. Na+H₂O NaOH + H₂ ________________________________ 3. LiOH + HCl LiCl + H₂O ________________________________ 4. S₈ +O₂ SO₃ ________________________________ 5. Fe +O₂ Fe₂O₃ ________________________________ 6. NH₄Cl +AgNO₃ NH₄NO₃ + AgCl ________________________________ 7. H₂O₂ H₂O +O₂ ________________________________ 8. C₇H₁₆O₂+ O₂ CO₂ + H₂O ________________________________ 9. H₂S +C; ₂S₈ +HCl ________________________________ 10. Mg+H₂SO₄ MgSO₄ + H₂ ________________________________ 7 CREDITS: returnofthestudysheet 11. P₄O₁₀ +H₂OH₃PO₄ ________________________________ 12. C₇H₁₆ + O₂ CO₂+H₂O ________________________________ 13. ZnCl₂ +Na₂CO₃ NaCl+ ZnCO₃ ________________________________ Answer these 1. To find the most common anion of cation of an element , we look at the ___________ and _____________. It is the____________________________ 2. An element , adter making ionic bondsm usually aquires a charge equal to the ________________________ Build a formula by combining the common cation and /or anion of each pair below 1. Calcium and Clorine ___________ 2. Magnesium and oxygen ____________ 3. Aluminum and Sulfate ____________ DON’T FORGET PARENTHASIS!!! 4. Calcium and oxygen _____________ 5. Hydrogen and chlorine _____________ 6. Sodium and Chlorine _____________ Final practice a) When the equation Al + Br2 ➔ AlBr3 is balanced, the coefficient for Al is __________ b) An equation is balanced by ___________________ 8 CREDITS: returnofthestudysheet c) During a chemical reaction ___________________ d) The substances formed as a result of a chemical reaction are called reactants (t/f) __________________ e) Isotope abundance is the __________________________________________________________________________ relative percentage of the isotopes in an element f) Law of conservation of matter states the ___________________________________ and this relates to this topic becous ______________________________________________________________________________ ________________________ matter cannot be created or destroyed ; it proves why subscripts cannot be changes 9