Scientists have been slowly extending the periodic table one element at a time, pushing to higher and higher masses, and have discovered some incredibly useful materials along the way. But the elements at the current end of the table are...

In a nuclear explosion, how close you are impacts your chance of survival. But who you are also has more influence than you might think. If everyone on Earth were equidistant from the bomb, here's the last person...

Humans have known that uranium can cause health problems since at least the 1820s. But that hasn't stopped us from making stuff with uranium in it over the past two centuries. Like teeth, toys, and diabetes treatments!



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When you’re learning about science for the first time, it can be easier to break things down into a simpler form, and you can end up with a few misconceptions about the world. But sometimes this is the first step to understanding that...

Hank remembers Back to the Future and tells us about his favorite word combination--lasers and fusion.

In order to have a meaningful conversation about the dangers of radiation exposure, it’s important to be clear about just how much radiation we are dealing with. Unfortunately, the units we use are kind of a mess… but SciShow is here...

Poisoning has always been a popular method of getting rid of one’s enemies, but is there actually a “perfect” poison capable of being completely undetectable? Here are 6 of the poisons that have confounded doctors throughout...

What does an atom look like? Throughout history scientists and philosophers have attempted to answer this question. As a result, they've come up with some useful models for understanding the building blocks of our universe.

Physics investigates why the universe behaves the way that it does, and today, Hank tells us about the three physics experiments that he thinks were the most awesome at helping us understand how the universe works.

How did we get here? Well, in terms of Atomic Chemistry, Hank takes us on a tour of the folks that were part of the long chain of other folks who helped us get to these deeper understandings of the world. From Leucippus to...

Mr. Andersen details the history of modern atomic theory.

In this video, I summarize All Nuclear Physics in about 10 minutes. Atoms are made of a positively charged nucleus surrounded by negatively charged electrons. The nuclei of atoms are made up of protons and neutrons. These are called...

Ernest Rutherford's Gold Foil Experiment: A Revolutionary Study

Background and Experiment D
esign
• Rutherford and his colleagues conducted an experiment to probe the structure of
the atom.
• The experiment...

Radioactivity is the property through which a heavier, unstable nucleus assumes a more stable state by emitting radiation. The process through which a nucleus turns into a stable one is called radioactive decay. But is radioactivity or...

The emission of particles as a result of the spontaneous decay of atomic nuclei.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

By the end of this learning object, the student will be able to: Recognize the three types of nuclear radiation.

This video covers:

- The idea that radioactive materials contain unstable iso
topes
- What alpha, beta, gamma and neutron ra
diation is
- How ionising and penet

rating they a
re

General info:
-...

This video provides an overview of how the modern ideas around the atom have developed over thousands of years. It begins with the ancient Greek belief that matter consists of tiny spheres that cannot be divided and were called atoms....

The History of Physics (Part 2)

Tests by a Swiss laboratory have found significant levels of Polonium on the clothing of late Palestinian leader Yasser Arafat. The test results will raise doubts about the 2004 death of Arafat, in which poisoning was initially ruled...

Radioactivity is the property through which a heavier, unstable nucleus assumes a more stable state by emitting radiation. The process through which a nucleus turns into a stable one is called radioactive decay. But is radioactivity or...

In this video, the narrator discusses the history and development of the atomic model. Starting with the ancient Greek concept of atoms as tiny spheres, the video describes how our understanding of atoms has evolved over time. Scientists...

It explains Atomic Models - Thomson model and Rutherford atomic model.

The video is a lecture on the hazards of radioactivity. It discusses the four main types of ionizing radiation (alpha particles, beta particles, gamma rays, and neutrons), how ionizing radiation can cause tissue damage in living...