Compounds
Compounds
The word compound refers to something that consists of two or more parts. How might you make a compound using elements? What are some compounds that you know?
Bell Work Make as many words as you can using the letters of the alphabet
ABCDEFGHIJK LMNOPQRSTUV WXYZ
Compounds Compounds: Made of Elements • Elements combine by reacting with one another forming a compound. A compound is a pure substance composed of two or more elements that undergo a chemical change. •Compounds are made up of two or more elements called molecules.
Compounds Compounds: Made of Elements • Elements join in a specific ratio according to their masses to form a compound. • Compounds have a specific ratio. It is always the same.. • If the ratio changes, the compound changes.
• For example, every sample of water has a 1:8 mass ratio of hydrogen and oxygen. •NaCl – Salt •HCO – Vinegar •CO2 – Carbon Dioxide
Compounds Properties of Compounds • Each compound can be identified by its physical and chemical properties. Physical 1. Melting Point 2. Density 3. Color
Chemical 1. Reacts with acid 2. Reacts with exposure to light
•Properties: Compounds Versus Elements Properties of compounds are different than the elements that form it. Hydrogen + Water Hydrogen + Carbon + Oxygen Carbon + Oxygen Sodium + Hydrogen + Carbon + Oxygen
Compounds Breaking Down Compounds • Compounds can be broken down into their elements or into simpler compounds during a chemical change. • Methods of Breaking Down Compounds The chemical change may need energy in the form of heat or electricity. •The result is a simpler compound(s) and or element(s)
The word compound refers to something that consists of two or more parts. How might you make a compound using elements? What are some compounds that you know?
Bell Work Make as many words as you can using the letters of the alphabet
ABCDEFGHIJK LMNOPQRSTUV WXYZ
Compounds Compounds: Made of Elements • Elements combine by reacting with one another forming a compound. A compound is a pure substance composed of two or more elements that undergo a chemical change. •Compounds are made up of two or more elements called molecules.
Compounds Compounds: Made of Elements • Elements join in a specific ratio according to their masses to form a compound. • Compounds have a specific ratio. It is always the same.. • If the ratio changes, the compound changes.
• For example, every sample of water has a 1:8 mass ratio of hydrogen and oxygen. •NaCl – Salt •HCO – Vinegar •CO2 – Carbon Dioxide
Compounds Properties of Compounds • Each compound can be identified by its physical and chemical properties. Physical 1. Melting Point 2. Density 3. Color
Chemical 1. Reacts with acid 2. Reacts with exposure to light
•Properties: Compounds Versus Elements Properties of compounds are different than the elements that form it. Hydrogen + Water Hydrogen + Carbon + Oxygen Carbon + Oxygen Sodium + Hydrogen + Carbon + Oxygen
Compounds Breaking Down Compounds • Compounds can be broken down into their elements or into simpler compounds during a chemical change. • Methods of Breaking Down Compounds The chemical change may need energy in the form of heat or electricity. •The result is a simpler compound(s) and or element(s)
