Fania Devika Della

A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds . The bond may result from the electrostatic force of attraction between atoms with opposite charges, or through the sharing of electrons as in the covalent bonds . The strength of chemical bonds varies considerably; there are "strong bonds" or "primary bond" such as metallic , covalent or ionic bonds and "weak bonds" or "secondary bond" such as Dipole-dipole interaction , the London dispersion force and hydrogen bonding . Since opposite charges attract via a simple electromagnetic force , the negatively charged electrons that are orbiting the nucleus and the positively charged protons in the nucleus attract each other. An electron positioned between two nuclei will be attracted to both of them, and the nuclei will be attracted toward electrons in this position. This attraction constitutes the chemical bond. Due to the matter wave

Periodic table of the elements , in chemistry , the organized array of all the chemical elements in order of increasing atomic number—i.e., the total number of protons in the atomic nucleus. When the chemical elements are thus arranged, there is a recurring pattern called the “periodic law” in their properties, in which elements in the same column (group) have similar properties. ( See Figure 1 .) The initial discovery, which was made by Dmitry I. Mendeleyev in the mid-19th century, has been of inestimable value in the development of chemistry. It was not actually recognized until the second decade of the 20th century that the order of elements in the periodic system is that of their atomic numbers , the integers of which are equal to the positive electrical charges of the atomic nuclei expressed in electronic units. In subsequent years great progress was made in explaining the periodic law in terms of the electronic structure of atoms and molecules. This clarification

LESSON PLAN K13 (RPP) School: SMA NEGERI 3 KERINCI Subject: CHEMICAL BOND Class / Semester: XI / 1 Time Allocation: 3 X 45 MINS (1 X MEETING) A. Core Competence (KI) KI3: Understanding, applying, analyzing factual, conceptual, procedural knowledge based on curiosity about science, technology, art, culture, and humanities with the insight of humanity, nationality, state and civilization related causes of phenomena and events, and applying procedural knowledge to the field of study Which is specific to his or her talents and interests to solve problems. . B. Basic Competencies and Indicators          Basic compentencies Indicators 3.5 Compare ionic bonds, covalent bonds, covalent coordination bonds, and metal bonds and their relation to the properties of substances 3.5.1. Describe element stability and bond 3.5.2 describe  mean of bond 3.5.3. Apply Lewis's theory in chemical bon