Dmitri Mendeleev

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/dmitri-mendeleev

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. When was Dmitri Mendeleev born?February 8, 1834
2. When did Dmitri Mendeleev die?February 2, 1907 (age 72)
3. Where was Dmitri Mendeleev born?Tobolsk, Russia
4. Who was Dmitri Mendeleev?Dmitri Mendeleev was a Russian scientist born in 1834 in Tobolsk, Siberia. He studied the building blocks of matter and became famous for his clever ideas about elements.
5. What did Mendeleev create?He created the Periodic Table, a chart that organizes all known elements by their atomic weight and shows how they behave in similar ways.

Periodic Law: The principle that the physical and chemical properties of elements are periodic functions of their atomic numbers (or weights).
Atomic Weight: The average mass of atoms of an element, calculated using the relative abundance of isotopes.
Valence: The combining power of an element, indicating the number of electrons an atom can gain, lose, or share.
Eka-Elements: Hypothetical elements predicted by Mendeleev to fill gaps in his periodic table, later discovered and named Gallium, Scandium, and Germanium.