For example, the atomic number of chlorine is 17. Every chlorine atom has 17 protons and 17 electrons. It has 17 positive charges and 17 negative charges, meaning that it is neutral overall. Atoms of ...

Atoms of different elements usually have different mass numbers, but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40. The symbol for an atom can be ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

More than 400 commercial nuclear power plants are now licensed worldwide. There are 94 in the US. The destruction of just one, at Diablo Canyon, California, could send lethal fallout pouring across ...

Researchers at Fudan University in Shanghai have developed the world's first fully functional memory chip made entirely from two-dimensional materials. The achievement, published in Nature, ...

The race is on to harness the near-infinite power of nuclear fusion—by building a star on Earth. And scientists are closer ...

KYIV, Ukraine (AP) — Ukraine’s president and the U.N. nuclear agency head are sounding the alarm about increased safety risks at the Russia-occupied Zaporizhzhia Nuclear Power Plant in southern ...

As the name suggests, particle accelerators involve accelerating subatomic particles to incredibly high speeds and smashing ...

There is no sign North Korea reprocessed spent fuel from its main nuclear reactor into plutonium in the past year, but it seems to have continued to enrich uranium, the other potential fuel for atom ...

The 2025 Nobel Prize in physics honors three quantum physicists—John Clarke, Michel H. Devoret and John M. Martinis—for their ...

International sanctions can have a paradoxical effect, spurring some nations to push harder to obtain nuclear weapons. Here’s ...

The Gilbert U-238 Atomic Energy Lab was an actual radioactive toy and learning set sold in the early 1950s. The $49.50 set came with four samples of uranium-bearing ores (autunite, torbernite, ...