Content :

Chemical Bonding [Gr.9 ]

 Metallic Bonding [Gr.9]
 Ionic and Covalent Bonding [Gr.9]

Content Standards :

demonstrates understanding of:
 the patterns observed in the number of outermost electrons of atoms, which are the ones involved in chemical bonding
 interactions between submicroscopic components of different substances that lead to atomic or molecular rearrangements forming new substances <br /> the concept that atoms and molecules combine in definite ratios to form larger structures with a new set of properties
 the type of bond that carbon forms explains the diversity of carbon compounds

Performance Standards :

 conducts a survey of organic and inorganic compounds found in natural resources of the Philippines
 indicates the uses of these compounds based on their properties and present data in a poster, chart, or multimedia presentation

Learning Competencies :

 explains properties of metals in terms of their structure
 recognizes different types of compounds (ionic or covalent) from their properties such as melting point, hardness, polarity, and electrical and thermal conductivity
 recognizes different types of elements that combine to form specific types of compounds (combination of metals and nonmetals)
 writes chemical formulas of ionic and covalent compounds formed by the first 20 elements
 explains the formation of ionic compounds and covalent compounds in terms of ionization energy and electron affinity
 infers trends in ionization energy and electron affinity.
 explains chemical changes in terms of the breaking of bonds and the rearrangement of atoms to form new substances