หน่วยที่ 2 ตารางธาตุtiraphankhumduang21. 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.
Microsoft power point ปฏิกิริยาเคมีThanyamon Chat.1. The document describes several chemical reactions through equations. It introduces reactants and products for reactions such as HCl + NaOH yielding NaCl + H2O.
2. Tables show data for the reaction of Mg and HCl over time, indicating the reaction is exothermic as heat is produced.
3. Different types of chemical reactions are defined such as exothermic, endothermic, and catalytic reactions which speed up reaction rates.
หน่วยที่ 2 ตารางธาตุtiraphankhumduang21. 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.
Microsoft power point ปฏิกิริยาเคมีThanyamon Chat.1. The document describes several chemical reactions through equations. It introduces reactants and products for reactions such as HCl + NaOH yielding NaCl + H2O.
2. Tables show data for the reaction of Mg and HCl over time, indicating the reaction is exothermic as heat is produced.
3. Different types of chemical reactions are defined such as exothermic, endothermic, and catalytic reactions which speed up reaction rates.
Bar modeling presentation for parentsedewatersThe document discusses bar modeling, a strategy for teaching math problems. It allows students to visually represent sets and parts of a whole using bars. Examples are given of part-part-whole problems involving addition and subtraction. Students are taught to draw bar models of the problems, write number sentences, and answer in a complete sentence. Bar modeling provides a way for students to understand what is known and unknown in word problems.
