The First 20 Of The Periodic Table

In our Chemistry topic, this is what we needed to do for our practical test. On this paper, you can see the first 20 elements on the Periodic Table. The pink sharpied letter is the symbol of the element. Below it is the count of Protons. Neutrons and Electrons in each element. Protons and Neutrons are in the centre of the atom, making up the nucleus. (nucleus is in the middle of an atom) However, electrons surround the nucleus. Each of them has a charge too, here's a guide;

Next, the green boxed numbers, those are the atomic number in each element. But what are atomic numbers? Atomic numbers is the number of protons in the nucleus of an atom of the element. Lastly the black circles on the bottom right is a shell/energy levels for Electron Arrangement. On each shell there is a limit. On the first shell it can only handle 2 electrons. on the second, it can handle 8 electrons and on the last, it can handle 8 electrons too.