The periodic table is organized in a grid where elements are arranged by their atomic number, which is the number of protons in each atom. Each element has a box that shows important information, including its symbol, atomic number, and atomic (relative) mass.
The atomic number tells how many protons an element has. In a neutral atom, the number of electrons is the same as the number of protons. The atomic mass (rounded to a whole number) is used to find the number of neutrons by subtracting the atomic number from the mass number.
Each element’s color shows whether it is a metal, nonmetal, or metalloid, and whether it is a solid, liquid, or gas. The column (family or group) tells which elements have similar properties and the same number of valence electrons, and the row (period) shows how many energy levels the atom has.
The Periodic table is a wealth of information and a very helpful resource to be used in Chemistry
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