1. The document discusses properties of elements in the periodic table, including atomic radius, ionic radius, classification of metals, nonmetals, and metalloids.
2. Atomic radius decreases from left to right within a period and increases down a group as the principal quantum level increases. Ionic radius is measured from the distance between nuclei of bonded ions. The ionic radius of cations decreases as the charge increases, while that of anions increases as the charge increases.
3. Elements are classified based on properties as metals, nonmetals, metalloids, and transition metals. Metals are good conductors of heat and electricity while nonmetals are typically poor conductors.
1. The document discusses properties of elements in the periodic table, including atomic radius, ionic radius, classification of metals, nonmetals, and metalloids.
2. Atomic radius decreases from left to right within a period and increases down a group as the principal quantum level increases. Ionic radius is measured from the distance between nuclei of bonded ions. The ionic radius of cations decreases as the charge increases, while that of anions increases as the charge increases.
3. Elements are classified based on properties as metals, nonmetals, metalloids, and transition metals. Metals are good conductors of heat and electricity while nonmetals are typically poor conductors.