Notes: Ionic and Covalent Compounds

1. Notes: Ionic and Covalent Compounds chemical bond • Compounds can be grouped by the kind of chemical bond they have. • A ____________is an interaction that holds atoms or ions together. • Bonding happens between the valence electrons of different atoms. • ______ ________ are electrons in the outermost energy level of an atom. • The type of compound that forms depends on what happens to the valence electrons. Valence electrons

2. 3. Ionic Compounds ionic bond • An _________ is an attraction between oppositely charged ions. • Compounds that have ionic bonds are called ____ _________. • Ionic compounds can form when atoms transfer electrons. ionic compounds

3. 4. Properties of Ionic Compounds brittle solids • Ionic compounds tend to be ___________ at room temperature. • Their ions are arranged in a repeating three-dimensional pattern called a ______ ______, which often breaks apart when hit. • Ionic compounds have ____ _____ _ _____, are _____ _____ __ _____, and often _____________________ in solution. crystal lattice high melting points highly soluble in water conduct an electric current

6. 5. Covalent Compounds share • Covalent compounds are compounds that form when atoms ______ electrons. • A _______ ____forms as a result of this sharing of electrons. • A _______ is the smallest particle into which a covalently bonded compound can be divided and still be the same compound. covalent bond molecule

7. 6. Properties of Covalent Compounds verydifferent • Properties of covalent compounds are _____________from the properties of ionic compounds. • Many covalent compounds have_______________, _____________ in water, and __________________________ in solution. low melting points do not dissolve do not conduct an electric current