If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the ...

Billions of years ago, the Blue Planet wasn’t exactly blue. Researchers have found that Earth’s first oceans may not have been blue at all like today. Instead, they may have gleamed in shades of green ...

Chlorine is more reactive than the iodine in potassium iodide solution: When a Group 7 element reacts, it gains one electron to form a negative ion with a stable electronic configuration – a full ...

They could see that relative atomic masses of the elements increased by steps. Many elements were unknown, so these early tables were incomplete. They also contained errors – some elements that were ...

Cascade PBS helps your community explore new worlds and ideas through programs that educate, inform and inspire. Your ...