Ionic, Covalent, and Metallic bonding : Ionic, Covalent, and Metallic bonding
Slide 2 : Bond Formation The positive sodium ion and the negative chloride ion are strongly attracted to each other. How Elements Bond 2 This attraction, which holds the ions close together, is a type of chemical bond called an ionic bond.
Slide 3 : Bond Formation The compound sodium chloride, or table salt, is formed. How Elements Bond 2 A compound is a pure substance containing two or more elements that are chemically bonded.
Slide 4 : More Gains and Losses Can elements lose or gain more than one electron? How Elements Bond 2 The element magnesium, Mg, in Group 2 has two electrons in its outer energy level. Magnesium can lose these two electrons and achieve a completed energy level.
Slide 5 : More Gains and Losses Some atoms, such as oxygen, need to gain two electrons to achieve stability. How Elements Bond 2 The two electrons released by one magnesium atom could be gained by a single atom of oxygen. When this happens, magnesium oxide (MgO) is formed.
Slide 6 : Covalent Bonds—Sharing Some atoms are unlikely to lose or gain electrons because the number of electrons in their outer levels makes this difficult. How Elements Bond 2 The alternative is sharing electrons.
Slide 7 : The Covalent Bond The chemical bond that forms between nonmetal atoms when they share electrons is called a covalent bond. How Elements Bond 2 Click image to view movie.
Slide 8 : The Covalent Bond Shared electrons are attracted to the nuclei of both atoms. How Elements Bond 2 They move back and forth between the outer energy levels of each atom in the covalent bond. So, each atom has a stable outer energy level some of the time.
Slide 9 : The Covalent Bond The neutral particle is formed when atoms share electrons is called a molecule How Elements Bond 2
Slide 10 : The Covalent Bond How Elements Bond 2 A molecule is the basic unit of a molecular compound.
Slide 11 : The Covalent Bond How Elements Bond 2 You can see how molecules form by sharing electrons in this figure.