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ELECTRON CONFIGURATIONS Sulfur 1s 2 2s 2 sp 6 3s 2 3p 4 Chromium 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 Lead (give the noble gas configuration) [Xe]6s 2 4f.

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Presentation on theme: "ELECTRON CONFIGURATIONS Sulfur 1s 2 2s 2 sp 6 3s 2 3p 4 Chromium 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 Lead (give the noble gas configuration) [Xe]6s 2 4f."— Presentation transcript:

1 ELECTRON CONFIGURATIONS Sulfur 1s 2 2s 2 sp 6 3s 2 3p 4 Chromium 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 Lead (give the noble gas configuration) [Xe]6s 2 4f 14 5d 10 6p 2 Barium [Xe]6s 2

2 Name the element… 2p 3 nitrogen 4s 2 calcium 4d 6 rhodium 5 p 6 xenon

3 Identify As Either Ionic Or Covalent potassium hydroxide ionic Pb 3 S 2 ionic Nitrogen dioxide Covalent Carbon tetrachloride covalent ammonium sulfate ionic Carbon monoxide covalent Magnesium chloride ionic Sulfur dioxide covalent Dihydrogen dioxide covalent

4 Give the oxidation numbers Oxygen -2 Calcium +2 Aluminum +3 Chlorine So, how many protons and electrons? Oxygen 8 p, 10 e Calcium 12 p, 10 e Aluminum 13 p, 10 e Chlorine 17p 18 e

5 Writing Formulas And Naming Ionic Bonds KOH potassium hydroxide (NH 4 ) 2 S ammonium sulfide KCl potassium chloride Li 2 S Lithium sulfide Calcium iodide CaI 2 Ammonium hydroxide NH 4 OH Aluminum chlorate Al(ClO 3 ) 3 Lead(II) sulfide Pb 3 S 2 Magnesium hydroxide Mg(OH) 2

6 Writing formulas and naming covalent bonds CO 2 Carbon dioxide CH 4 Carbon tetrahydride S 3 O Trisulfur monoxide Sulfur trioxide SiO 3 Dinitrogen trisulfide N 2 S 3 P 3 N 2 Triphosphorus dinitride

7 Complete The Blanks In an ionic bond, electrons are ____. Transferred An ionic bond is always between a__ and a ___. Metal, nonmetal In a covalent bond, electrons are ____. Shared A covalent bond is always between 2 ____. Nonmetals When you name a covalently bonded molecule, you use ____. prefixes

8 Given the two chemical equations, circle the one that is balanced. a. 2Na + Cl 2 → 2NaCl b. 2Na + 2Cl 2 → 2NaCl (a is balanced) a. C 3 H 8 + 5O 2 → 3CO 2 + 4H 2 O b. 2C 3 H 8 + 5O 2 → 3CO 2 + 8H 2 O (a is balanced) a. 2NH 3 + 5O 2 → 2NO + 3H 2 O b. 4NH 3 + 5O 2 → 4NO + 6H 2 O (b is balanced)

9 Balance the equations ____ Al + ____Fe 3 N 2 → ___ AlN + ____ F 2,1,2,3 ____Ag 2 S →____Ag + ____ S 8 8, 16,1 ____ ZnS + ____AlP → ____Zn 3 P 2 + ____Al 2 S 3 3, 2,1,1 ____ Cu 2 O + ____ C → ____ Cu + ____ CO 2 2,1,4,1

10 The oxidation number of calcium is _____. +2 Is calcium a metal or nonmetal? Metal Because it forms a positive ion, it is called a __. cation The oxidation number for chlorine is ____. Is it a metal or nonmetal? Nonmetal Because it forms a negative ion, it is called an ____. anion

11 Definitions… The amount of matter in a substance? Matter The amount of space an object takes up is Volume A ratio that compares the mass of an object to its volume? Density If you cut a piece of gold in half, it’s volume and mass change. Does it’s density? No- density is an intrinsic property

12 Another half-life problem What is the half-life of an isotope if 125 g of a 1000 g sample of the isotope remains after 3.0 years? To go from 1000 g to 125 g means that 3 half lives have passed. The half life must be 1 year. 1 year (1 half-life= 500 g) 2 year (2 half-lives = 250 g) 3 years (3 half-lives = 125 g left)

13 Identify The Reactant(s) In The Equation SnO H 2 → Sn + 2 H 2 O SnO H 2 What are Sn + 2 H 2 O? The products

14 SOLID, LIQUID OR GAS? Fastest moving particles Gas Particles are tightly packed together Solid The state of matter with an indefinite shape and definite volume Liquid Particles are in constant motion gas

15 The state of matter with an indefinite shape and indefinite volume gas The state of matter with a definite shape and definite volume Solid List the 3 types of nuclear radiation in order from most massive to least massive. Alpha, beta, gamma

16 What type of nuclear reaction occurs in the sun? Fusion What type of nuclear reaction produces electricity? Fission When a chemical reaction occurs, the mass of the reactants ___ the mass of the products. Equals If the mass of the reactants is 10 g, then the mass of the products is ___ g. 10 Which law explains why these must be equal? Law of Conservation of Mass

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20 SCIENTISTS… Bohr Bohr Model Mendeleev Organized Periodic Table by atomic number Rutherford The atom is mostly empty space JJ Thompson Plum pudding model Democritus First came up with the idea that all matter is made of atoms, but that it cannot be broken down any further

21 Review all the worksheets!!! Good luck!


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