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.
Periodic Table of the Elements. The periodic table is an arrangement of the chemical elements that is a powerful tool for studying those elements and how they combine. The elements are arranged in rows according to their atomic number and in columns according to their valence electrons or number of electrons in the outer shell.