If you cannot get Snap Cubes, you can use colored Styrofoam balls or gumdrops with toothpicks. 1. Remind students of the different substances they have worked with and explain that these substances ...

From nearly indestructible metals, like tungsten, to delicate clouds in the sky, atoms make up everything around us. But do ...

Atoms of different elements have different numbers ... atom that physical or chemical effects start happening," Baird explained. "This is probably one of the best definitions for touching on ...

Ensure students have an understanding of how mass and atomic numbers can explain the number of protons, neutrons and electrons in atoms. Explain with examples that isotopes have the same number of ...

Superradiance in optical cavities involves atoms emitting light collectively when interacting with cavity photons, a ...

Polyethylene is made up only of carbon and hydrogen atoms. The mass of carbon is pretty low. The mass of hydrogen is the lowest of all the atoms. These low masses help explain why polyethylene has a ...

The Atoms for Peace and Development motto summarises the IAEA's mission, which is to ensure that nuclear technology is used only for peaceful purposes and to help Member States use this remarkable ...

Transmission electron microscopy (TEM) is one of only few techniques that allows individual atoms to be seen and analysed. However, the TEM instrument requires a high vacuum environment, and the ...

One half of the Physics World 2024 Breakthrough of the Year has been awarded to Mikhail Lukin, Dolev Bluvstein and colleagues at Harvard University, the Massachusetts ...

Chapter 12: Atoms Question 1: Explain Rutherford’s model of the atom and its limitations. Question 2: Derive the expression for the radius of the nth orbit of the hydrogen atom using Bohr’s model.