Educational worksheet introducing the Periodic Table of Elements, featuring a historical overview and fill-in-the-blank questions.

Periodic Table Introduction worksheet with text, a periodic table chart, and a portrait of Dmitri Mendeleev.

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1 – The chart used to organize the elements is called the Periodic Table of Elements.
2 – Columns on the Periodic Table are called groups or Families of elements.
3 – Rows on the Periodic Table are called periods.
4 – Elements show trends based on atomic radius, Electron Affinity and chemical properties.
5 – The 3 general categories of elements are; Metals - Non-metals - Metalloids.
6 – Metals are elements that are usually good conductors and are shiny.
7 – In 1869 Dmitri Mendeleev predicted undiscovered elements with his table of elements.
8 – Today, there over 118 elements on the current Periodic Table of Elements.

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