Neptunium

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/neptunium

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. How heavy is Neptunium?Approximately 237 u (for Np-237)
2. What is the element symbol?Np
3. What is the first synthesis date?1940
4. What is neptunium and why is it special?Neptunium is a shiny metal that scientists made for the first time. It is the first element that people created in a lab, and it is heavier than uranium.
5. Why does neptunium turn dull when it touches air?Neptunium is silvery when fresh, but it quickly reacts with air and forms a dull layer.

Actinide Series: A group of 15 metallic chemical elements with atomic numbers from 89 to 103.
Allotropic Forms: Different structural modifications of the same element in the same physical state.
Neutron Capture: A nuclear reaction where an atomic nucleus absorbs a neutron, increasing its mass number.