Elements, Compounds, and Mixtures Overview Table

Elements, Compounds and Mixtures Worksheet 1. Elements -a pure substance containing only one kid of atom -an element is always uniform all the way through (homogeneous) -an element cannot be sepearted into simpler materials (Except during nuclear reactions) -over 109 existing elements are listed and classified on the periodic table 2. Comounds -A pure substance containing two or more kinds of atoms -the atoms are chemically 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 cannot 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 3. Mixtures -Two or more elements ir compounds NOT chemically combined. -No reaction between substances -mixtures can be uniform (called homogeneous) and are known as solutions -Mixtures can also be non-uniform (called heterogeneous) -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 4. Diamond (C) Element 5. Air Mixture 6. Kyrpton (K) Element 7. Water (h20) Compund 8. Ammonia (NH3) Compound 9. Wood Mixture 1/3 10. Dry ice (CO2) Compound 11. Sugar (C6H12O6) Compound 12. Sulfuric acid (H2SO4) Compound 13. Bismuth (Bi) Element 14. Alcohol (CH3OH) Compound 15. Salt (NaCl) Compound 16. Bronze Mixture 17. Baking soda (NaHCO3) Compound 18. Milk Mixture 19. Gasoline Mixture 20. Uranium (U) Element 21. Pail of garbage Mixture 22. Energy Not any of them 23. ink Mixture 24. Titanium(Ti) Element 25. Iron (Fe) Element 26. Electricity Not any of them 27. Popcorn Mixture 28. A dog Mixture 2/3 29. Gold (Au) Element 30. Pizza Mixture 31. Concrete Mixture 3/3