Read the article. Use your understanding to answer the questions that follow. What type of source is this article? primary or secondary and how do you know

C

Explanation:

The article was sourced from the Oak National Laboratory

Which reasons did you include in your response? Check all of the boxes that apply.

1. The article does not present original research.

and

3. The article has references to primary sources.

the answer is barium and copper bromide