Atomic mass is the decimal number that is on the periodic table...
Boron's atomic mass is 10.81
TMS has 12 protons which are all equivalent and four carbons, which are also all equivalent. This means that it gives a single, strong signal in the spectrum, which turns out to be outside the range of most other signals, especially from organic compounds.
The letter only has reflection symmetry, if you rotated it it would look the same.
Nuclear reactions happen inside the nucleus,so it changes the protons and neutrons
We found cesium, strontium, aluminum, sulfur, chlorine, and fluorine on the periodic table. Cesium is the farthest left and the lowest, while fluorine is the farthest right and the highest, so we know they have the highest metallic character and the lowest metallic character, respectively.
