Periodic Table

1234567
Across
  1. 4. Scientist credited with organizing the modern periodic table by properties of known elements.
  2. 6. smallest unit of an element that can maintain properties of that element
  3. 7. Examples: Hydrogen; Carbon; Nitrogen; Oxygen; Phosphorus; Sulfur; Selenium; etc
Down
  1. 1. A pure substance composed of 2 or more elements that are chemically combined.
  2. 2. A pure substance that cannot be separated into a simpler substance by physical means.
  3. 3. Table Organized chart of the elements found on earth based on their properties, chemical symbol, and classification (metals, nonmetals, metalloids)
  4. 5. Examples: Nickel; Copper; Titanium; Calcium; Sodium; Ununilium; etc