![]() ![]() The elements are arranged in the table by. These electrons screen or shield the outer electrons from the nuclear charge. THE PERIODIC LAW: Physical and chemical properties of the elements are periodic properties of their atomic number. This is because of the screening effect of the filled inner electron levels. 5.4K Share 256K views 4 years ago Periodic Table Across the periodic table, we can elucidate trends (patterns) in atomic properties. ![]() The greater attraction between the increased number of protons (increased nuclear charge) and electrons, pulls the electrons closer together, hence the smaller size.Īs you move down a group in the periodic table, the covalent radius increases. The covalent radius (a measure of how large individual atoms are) shows different trends if you are moving across a period or down a group.Ī comparison of the relative covalent radii of atoms is shown in the diagram below.Īcross a period from left to right, the covalent radius decreases.Īs you move from left to right across the periodic table, atoms have more electrons in their outer energy level and more protons in their nucleus. Patterns and trends in the periodic tableĬhemists observe patterns in different properties of elements as they are arranged in the periodic table. ![]()
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