Recently in class (Somewhere around May 15), we were learning about atoms. We watched a BrainPop video and we had to write 3 things I found out, 2 interesting things I found about atoms, and 1 question. My question was how do people find atoms? I used some links to find an answer to my question:
The 3 thinks I found out was: Democritus called atoms atoms from the greek word atomos. I also heard that atoms are made of protons, neutrons and electrons. Neutrons have no electrical charges, while protons have positive electrical charge, and the periodic table of elements; all the items/things displayed on there are all made of atoms!
There were 2 things I found interesting: The density of nucleus is the size of 6.2 billion cars. I also wrote that the center of atoms were made out of protons, neutrons and electrons. The nucleus is stuck together by strong forces.
Atoms are very small things (smaller than dust) that are found almost everywhere! It’s impossible to see an atom with a light microscope, but in 1981, somebody invented something called a scanning tunneling microscope. You can also call it STM. Using a scanning tunneling microscope, it’s now possible to see atoms.
Soon after that, in the UK, SuperSTEM Facility made an electron microscope. Just like the scanning tunneling microscope, you can also see atoms; you can also see atomic columns (A photo of atomic columns ^^^ go up). You can see them because the electron microscope uses beams of electrons instead of photons. Photons have a longer wavelength than electrons, which means electrons have short wavelengths. Therefore it’s more useful to use electrons. You can see closer and zoom into stuff more than before.
Science in the 20th century showed the structure of an atom. They found out that the structure of the nucleus and the forces hold the atom together.
People and scientists from around the world are also trying to find another way to be able to spot maybe smaller things than atoms.