1. Remind students of the different substances they have worked with and explain that these substances are all made of atoms and molecules. Remind students that the different materials they have ...

A team of physicists and engineers at the University of Colorado Boulder has discovered a new way to measure the orientation ...

Bohr turned to Planck's quantum theory to explain the stability of most atoms. He found that the ratio of energy in electrons and the frequency of their orbits around the nucleus was equal to ...

Scientists changed the model so that it could explain the new evidence ... back when they were expected to pass straight through. Atoms have a central positive nucleus. Most of the mass of ...

For the first time, researchers have been able to measure the quantum state of electrons ejected from atoms that have ...

Students will be able to explain that the parts of an object can be rearranged to create a new object. Students will also get a sense of the number of different objects that can be created from a ...

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 ...

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 structure of materials changes in a vacuum.