Elements, Compounds, and Reactions

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Presentation transcript:

Elements, Compounds, and Reactions Lesson 3 Compounds Elements, Compounds, and Reactions

Essential Question;) How do atoms combine to form all types of matter? Vocabulary: Compound Ion Ionic bond Covalent bond

What are Compounds? -A compound is a substance made of two or more elements that are chemically joined in a specific combination. Examples: Citric Acid which is found in oranges, lemons, and other citrus fruits

Properties of Compounds Properties of compounds are usually different from the elements from which it is made. Compounds are formed from chemical reactions. Examples: Salt

How Do Atoms Bond? Atom bonds are formed by losing electrons, gaining electrons, and/or sharing electrons. Ion is an atom that is no longer electrically neutral because it has lost or gained electrons. An ionic bond occurs between metals and nonmetals when the substances react to gain or lose electrons in an attraction to become stable. A Covalent bond is a chemical bond formed when two atoms share valence electrons. It usually occurs between nonmetals.

What compounds make up common substances? Common substances are classified as either organic or inorganic. Organic substances all contain carbon and many are made by living things. Examples are the cells and tissues of your body. Inorganic substances do not come from living things and most of them do not contain carbon. Few carbon compounds that are inorganic substances are carbon dioxide and carbon monoxide; they are called inorganic compounds.

Organic v. Inorganic Substances

Essential Question Answer Atoms either gain or lose electrons (ionic bond)or share electrons ( covalent bond) in bonding with other atoms to form substances and become stable. 

Homework Complete lesson 3 review on page 155. Write definitions for lesson 3. (page 150) Find examples of compounds that are covalent bonded. Make a chart showing its name and its formula. Reminder: unit 1 lesson 1 and 2 quick quiz!

Covalently Bonded Compounds A covalent compound is made when two or more nonmetal atoms bond by sharing valence electrons. The shared valence electrons between two nonmetal atoms is called a covalent bond. Covalent bonds are formed when two atoms begin sharing electrons. Covalent Compounds: Properties, Naming & Formation ... study.com/.../lesson/covalent-compounds-properties-naming-formation.htm...

https://study. com/academy/lesson/endothermic-and-exothermic-reactions https://study.com/academy/lesson/endothermic-and-exothermic-reactions.html