Thank you in advance. Hi Lara: The important thing to remember about taking a probiotic: Be sure to take one containing multiple species of bacteria, as your gut needs to maintain the proper balance of bacteria to stay healthy and boost your immune system. Most high-quality probiotics contain the right balance.
The atomic number is the number of protons each atom has in its nucleus. By arranging the elements in this way, those with similar properties (characteristics) are grouped together. As with any grid, the periodic table has rows running left to right, and columns running up and down. The rows are called PERIODS and the columns are called GROUPS. Hydrogen (H) is the first element in the periodic table because it has just one proton in its nucleus. Helium (He) is second, because it has two protons, and so on.
This lesson will answer those questions. The elements in the periodic table are arranged in rows according to atomic number and in columns according to the configuration of the outer orbit or shell. The chart below just shows the first 18 elements, so you can get an idea of how the periodic table arranges them.