Osmium

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/osmium

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. Who discovered Osmium?1803
2. What is the element symbol?Os
3. What is the atomic number?76
4. What is Osmium and why is it special?Osmium is a bluish‑white metal that is the hardest and densest stable element. It is part of the platinum group and is extremely heavy, weighing about 22.6 metric tons per cubic meter.
5. Why is Osmium so rare?Osmium is found in the Earth's crust at only about 50 parts per trillion, making it one of the least common elements.

Platinum Group Metals: A set of six metallic elements known for their rarity, high density, and resistance to corrosion.
Transition Metal: Elements in the d-block of the periodic table, characterized by their variable oxidation states and ability to form complex compounds.
Alloy: A metallic substance composed of two or more elements, typically mixed in a molten state to enhance properties like strength or hardness.
Osmium Tetroxide (OsO4): A volatile and toxic oxide of osmium, known for its strong odor and use in biological staining.