HS-PS1-1
Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
- Physics
World’s coolest ‘clock’ is also crazy-accurate
This is the time to beat — the world’s most accurate atomic clock ever. At its heart is a ‘fountain’ of cesium atoms chilled nearly to absolute zero!
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- Physics
Explainer: How a synchrotron works
Giant magnets direct superfast light into beams up to 30 million times as bright as those produced by a laser pointer.
