EOC REVIEW focus on CHEMISTRY

1. EOC REVIEW focus onCHEMISTRY

2. Atomic Theory Scientists Choose answers from top to bottom____ John Dalton____ J.J Thompson____ Ernest Rutherford____ Niels Bohr____electron cloudA) electrons (-) embedded on positive charged sphere “chocolate chip cookie or plum pudding”B) electrons not in fixed orbits but in certain areas around nucleusC) spherical solid atomsD) electrons in fixed orbits around the nucleusE) dense positive nucleus surrounded by electrons – gold foil experiment C A E D B

3. Identify the scientist the theoryJohn Dalton J.J ThompsonErnest RutherfordNiels Bohrelectron cloud John Dalton 1) chemical elements are made of atoms. 2) the atoms of an element are identical in their masses 3) atoms of different elements have different masses 4) atoms only combine in small, whole number ratios such as 1:1, 1:2, 2:3 and so on. 5) atoms can be neither created nor destroyed

4. Identify the scientist the theoryJohn Dalton J.J ThompsonErnest RutherfordNiels Bohrelectron cloud JJ Thompson

5. Identify the scientist the theoryJohn Dalton J.J ThompsonErnest RutherfordNiels Bohrelectron cloud Ernest Rutherford described the atom as a tiny, dense, positively charged core called a nucleus, in which nearly all the mass is concentrated, around which the light, negative constituents, called electrons, circulate at some distance, much like planets revolving around the Sun

6. Identify the scientist the theoryJohn Dalton J.J ThompsonErnest RutherfordNiels Bohrelectron cloud Gold Foil Experiment Ernest Rutherford

7. Identify the scientist the theoryJohn Dalton J.J ThompsonErnest RutherfordNiels Bohrelectron cloud Niels Bohr

8. Identify the scientist the theoryJohn Dalton J.J ThompsonErnest RutherfordNiels Bohrelectron cloud Electron cloud

9. Nucleus- center of the atom . Contains positively charged protons and neutral neutrons (blue) The mass of each proton and neutron= 1 a.m.u. protons + neutrons = atomic mass. Negatively charged electrons orbit the nucleus in orbital (shells). Electrons are so small it is not considered when calculating atomic mas

10. Identify the element : # of protons: # of electrons The atomic mass is 23. How many neutrons: sodium 11+ 11- 23 -11+ 12n 12n

11. Identify and answer each question Answers appear counter-clockwise atomic number Cu # protons = # electrons = # neutrons = 30 30 symbol 30 average atomic mass 63.54 34 What element is this? Where is it located in the periodic table? copper transition metals

12. Identify the shaded groups:Give the oxidation # :How many valence electrons does the group contain: alkali metals 1+ 1 Group Number: 1

13. Identify the shaded groups:Give the oxidation # :How many valence electrons does the group contain: Alkaline earth metals 2+ 2 Group number: 2

14. Identify the shaded groups: Give the oxidation # :How many valence electrons does the group contain: Boron group 3+ 3 Group number: 13

15. Identify the shaded groups:Give the oxidation # :How many valence electrons does the group contain: carbon group 4+ - 4 Group number: 14

16. Identify the shaded groups:Give the oxidation # :How many valence electrons does the group contain: nitrogen group 3- 5 Group number: 15

17. Identify the shaded groups:Give the oxidation # :How many valence electrons does the group contain: oxygen group 2- 6 Group number: 16

18. Identify the shaded groups:Give the oxidation # :How many valence electrons does the group contain: HALOGEN GROUP 1- 7 Group number: 17

19. Identify the shaded groups:Give the oxidation # :How many valence electrons does the group contain: Noble gas family 0 8 Group number: 18

20. Groups 3 – 12 are known as the transition metals

21. Which pair of elements has the most physical and chemical properties in common? • Ge and Se B) K and Kr • C) Al and Ga D) Ba and Bi Elements in the same group have the most physical and chemical properties in common!

22. Horizontal rows on the periodic table are known as PERIODS periods All elements on a ___________ have the same number of ________ _______ energy levels 4th row = 4 energy levels

23. An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom? A ) 29 B) 35 C) 64 D) 93 29 protons +35 neutrons

24. Which one of these scientists described a model of the atom that included energy levels? ____ John Dalton____ J.J Thompson____ Ernest Rutherford____ Niels Bohr

25. Maximum Number of Electrons per Energy Level 1st energy level: electrons 2nd energy level: electrons 3rd energy level: electrons 4th energy level: electrons 2 8 18 32

26. How many protons and neutrons are there in an atom of B 11 5 protons ______ neutrons ______ 5 6 B 11 5 atomic mass atomic number

27. 18 neutrons 17 protons 37 17 20 neutrons protons 17 ISOTOPES These are ___________ of chlorine Cl 35 17 Cl

28. Which chemical equation represents a double replacement reaction?A) 2Na+Cl2 2NaClB) 2KClO3 2KCl+3O2C) Zn+2HCl ZnCl2 +H2D) NaOH + HCl NaCl+H2O

29. Which chemical formula represents magnesium phosphate? Use your reference table MgPO4 Mg2PO4 2+ 3- Mg3(PO4)2 Mg2(PO4)3 To solve: Put in your oxidation #s. If they are not equal use the criss-cross method. Don’t forget the parentheses around the polyatomic ion

30. Identify the following equationCu+2AgNO3→Cu(NO3)2 + 2AgA) synthesisB) DecompositionC) Single ReplacementD) Double Replacement ___ ___ ___ ___

31. Identify the following equation CaCO3→CaO+CO2A) synthesisB) DecompositionC) Single ReplacementD) Double Replacement

32. A laboratory worker found the following properties for a sample of copper. Properties of Copper Sample Physical description: Shiny red metal Melting Point (ºC): 1084.62 Mass (g) : 50.36 Boiling Point (ºC): 2562 Volume (cm³): 5.62 What is the density of the copper? A 0.112 g / cm³ B 8.96 g / cm³ C 21.6 g / cm³ D 44.7 g / cm³ Density = mass volume