Chemistry Midterm Vocabulary

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Across
  1. 3. matter with the same fixed composition and properties
  2. 8. law in which states in a chemical change- matter is neither created nor destroyed
  3. 9. a mixture that is the same throughout or homogenous
  4. 12. A horizontal row in the periodic table
  5. 13. simplest form of matter
  6. 15. an observation made with measurement, numerical
  7. 19. combination of two or more substances in which the basic identity of each substance is not changed
  8. 21. the force of gravity acting on an objects mass
  9. 24. smallest unit of matter
  10. 26. a solid solution containing different metals and sometimes nonmetallic substances
  11. 28. The space in which there is a high probability of finding an electron
  12. 29. believed matter had a smallest unit and could not be divided
  13. 32. the substance that is being dissolved when making a solution
  14. 33. Weighted average of masses of all naturally occurring
  15. 36. Tendency to occur at regular intervals
  16. 37. developed the atomic theory and solid sphere model
Down
  1. 1. the digits in a number that express accuracy and precision
  2. 2. chemical combination of two or more different elements in a fixed proportion
  3. 4. the substance that dissolves the solute when making a solution
  4. 5. established the law of conservation of mass
  5. 6. how close multiple measurements are to each other
  6. 7. the variable that is measured and expected to change
  7. 10. changed Greek ideology, determined air was a mixture of gas
  8. 11. The principle that it is impossible to accurately measure both the position and energy of an electron at the same time
  9. 14. anything that takes up space and has mass
  10. 16. States that each electron occupies the lowest energy orbital available
  11. 17. the variable that is changed or controlled by the scientist
  12. 18. believed matter could be infinitely divided
  13. 19. the measure of the amount of matter an object contains
  14. 20. Atoms of an element that are chemically alike but have different masses
  15. 22. the physical and chemical properties of the elements repeat in a regular pattern when they are arranged in order increasing atomic number
  16. 23. an observation made without measurement, descriptive
  17. 25. An electron in the outermost energy level of an atom
  18. 27. Elements in vertical columns of the periodic table
  19. 30. the science that investigates and explains the structure and properties of matter
  20. 31. of an element by their abundance
  21. 33. how close a measurement is to its true value
  22. 34. period of 2000 years of qualitative science searching to purify, and perfect metals
  23. 35. developed the law of definite proportions