Don't forget to refer to your Unit Page (tabbed in journal) for class definitions.
Remember that chemistry is a new language that you must work at to become fluent in ...

  • Chemical Change = new chemicals are released in a reaction ... need to be extra careful to be safe
  • Conclusion = explain how data supports/does not support your hypothesis
  • Goggles = eye protection, not glasses 
  • Hypothesis = explains how you think one variable will affect other variable from original question; If, then statement
  • Safety = thinking things through so you do NOT get hurt
  • Atom = smallest unit with properties
  • Chemical Property = explains what can change the chemical into a different chemical through a reaction
  • Density = mass / volume
  • Electron = subatomic particle outside of nucleus with 1- charge; no mass & negative charge
  • Mass = amount of matter in object or the inside of the object
  • Neutron = subatomic particle in nucleus with no charge; mass & no charge
  • Physical Property = description/explains what the chemical is like: color, density, texture, etc.
  • Proton = subatomic particle in nucleus with 1+ charge; mass & positive charge
  • Volume = how much space an object takes up or the outside of the object
  • Atomic Radii = size of atom; PT trend decreases from left to right in period
  • Electronegativity = energy to attract electrons to a substance; amount an atom wants to have another electron
  • Family/Group = vertical column (|) on periodic table; elements with same valence electrons making them similar in properties
  • Ionization energy = energy to REMOVE an electron
  • Period = horizontal row (-) on periodic table; elements with same electron shell level
  • Periodicity = trends on periodic table
  • Periodic Table = Organizing chart that contains all elements, organized by electron shells and valence electrons
  • Trend = shows a pattern
  • Valence Electron = outer most electrons