Chem Elements Compounds and Mixtures Worksheet

K�i Name ----�-------Elements, Compounds & Mixtures Worksheet Part 1: Read the following information on elements, compounds and mixtures. Fill in the blanks where necessary. Elements: atoYYl • A pure substance containing only one kind of • An element is always uniform all the way through (homogeneous). • An element tRVllfl ot be separated into simpler materials (except during nuclear reactions). • Over 100 existing elements are listed and classified on the per,· Q 1 C C-l b J c\ .f Compounds: e,\ e. � • A pure substance containing two or more kinds of eMen 1 • The atoms are CY\rttf) 1 t g_ I\� combined in some way. Often times (but not always) they come together to form groups of atoms called molecules. • A compound is always homogeneous (uniform). • Compounds CA/II not be separated by physical means. Separating a compound requires a chemical reaction. • The properties of a compound are usually different than the properties of the elements it contains. Mixtures: • Two or more ,e,\.e•Menrt or L0Yr1p0l,U'1d5 NOT chemically combined. • No reaction between substances. • Mixtures can be uniform (called hD'MOC\.Q v10\A.> ) and are known as solutions. • Mixtures can also be non-uniform (called beff ( Q Clf �1 f' OV S ). • Mixtures can be separated into their components by chemical or physical means. • The properties of a mixture are similar to the properties of its components. Part 2: Classify each of the following as elements (E), compounds (C) or Mixtures (M). Write the letter X if it is none of these. 11._Milk _l_Diamond � _Lsugar (C6H1 2O6) LSulfuric Acid (H2SO4) J1__Gasoline 11._Air _£:_Uranium (U) _I_Krypton (¼-) _f_Bismuth (Bi) C, Water (H2O) _k_Alcohol (CH3OH) _l1_Pail of Garbage _XEnergy LAmmonia (NH3)_l_Salt (NaCl) Alnk t-'\ Wood t-1 Bronze C,, Baking Soda (NaHCO3)_l_Titanium (Ti) __t_ory Ice (CO2) _f_Iron (Fe) AElectricity �Popcorn _!1_A dog _f_Gold (Au) 11._Pizza 11_concrete Name ------------Part 3: Match each diagram with its correct description. Diagrams will be used once. 0 0 0 A B • 0 0 0 • e:) 0 D C 0 E G 1. Pure Element - only one type of atom present. E 2. Mixture of two elements - two types of uncombined atoms present. B 3. Pure compound - only one type of compound present. A 4. Mixture of two compounds - two types of compounds present. 1) 5. Mixture of a compound and an element. Part 4: Column A lists a substance. In Column B, list whether the substance is an element (E), a compound (C), a Heterogeneous Mixture (HM), or a Solution (S). (Remember a solution is a homogeneous mixture.) In Column C, list TWO physical properties of the substance. Column A 1. Summer Sausage 2. Steam 3. Salt Water 4. Pencil lead (Pb) 5. Dirt 6. Pepsi 7. Silver (Ag) 8. Toothpaste (Na2HP04) 9. A burrito 10. Italian Dressing 11. Chicken Soup 12. Lemonade Column B Column C rt� s � '\ F \-\ H s r_ I==' H·M H-M HM s \ "\ \ \ \ \ �)\ '-I - \ i 'J\ � '\ \� �\ - NAME INSTRUCTIONS: Write E in the blank if the material is heterogeneous or O if it is homogeneous. Q 1. Wood 2. Freshly-brewed black coffee tDfr\?()�n (1 3. Water • ' 4. Lucky Charms® 5. Salt U)YY\?DU.(\ d _Q_ X t X 6. Dirt 7. Sausage-and-mushroom pizza 8. Air 9. Milk 10. Gold t\e mev;+ INSTRUCTIONS: Classify each of the following as an element[E], a compound[C], or a mixture [M]. E- 11. Gold C, tv\ 12. Water 13. Seawater c., 14. Sugar 15. A chocolate sundae M 16. Air 17. Carbon dioxide 18. Silver 19. Ice 20. A Big Mac® INSTRUCTIONS: Classify each of the following properties of matter as physica/[P] or chemica/[C]. 1' 21. Color ? 22. Density 23. Burns easily (flammable) 24. Not affected by acids 25. Boils at 450 °c C, C, _L 26. Reacts violently with chlorine 27. Good conductor of heat 28. Dissolves readily in water 29. Melts at 145 °c 30. Malleable INSTRUCTIONS: Classify each of the following changes in matter as physical[P] or chemica/[C]. 31. Grinding chalk into powder 32. Dissolving salt in water 33. Dissolving zinc in acid 34. Tearing a piece of paper 35. Stretching copper into wire "? y _t_ j' r 36. Burning gasoline 37. Hammering gold into foil 38. Melting ice e E 0 X M C� E t _ti_ t "? t i_ :p t 1' p 39. Digesting food c... 40. Making hydrogen from water (, INSTRUCTIONS: Classify each of the following as an intensive property[!] or an extensive property [E]. 41. Mass 42. Density 43. Melting point s \ I 46. Color 47. Volume 48. Length E E Name ___________ Hr -Scientific Notation and Sig Figs Write the following numbers in scientific notation 5. 1, 000 , 000, 000 2. 0.0002103 3. 910 4. 0.0000483 4 2.\03 �\D • C\. \�\D.,,_ J\. f� Y--\ D-s 6. 0.81 7. 1,002,000 8. 0.0086 l x I D°\ o. I xlD�1 L 001 �ID '° 5. lo)( l() --3 Write the following values long hand 4. 4.4 X 10" 1 2. 3. 7.11 X 10·4 1.2 X 102 o. OCb "'1 \ \ 5. 3.335 X 106 I 6. 8.22 X 10·3 Write the following calculator values in scientific notation and in long hand l. 5.5E-6 2. 9.1E3 3. 2.2E-4 33o$00D I 91(5D 011000'1.2. O. OD C. {.) ''71- 2..