Physical and Chemical Properties
Boiling and Melting Point
What are physical properties of matter?
Covalent bond definition
What is a chemical bond where pairs of valence electrons are shared? or What is a bond where pairs of electrons are shared?
Explain valence electrons
What are the outermost reactive electrons in an atom?
Chemical equations are used to do this
What is used to describe a chemical reaction?
Explain synthesis equation and give an example
What happens when a reaction when two elements combine to form a compound.
Example Equation: C + O2 ---> CO2
Oxidation (rusting) and flammability (ability to burn)
Ionic bond definition
What is a chemical bond where one atom of an element gains a valence electron and another atom of a different element gives up a valence electron? or What is a chemical bond where electrons are transferred forming a positively and negatively charged ions?
Matter is not created or destroyed in a chemical reaction or physical change. Name the law
What is the law of conservation of matter?
Explain decomposition reaction and give an example
What happens when a compound breaks apart from a whole into its parts. Compound breaks apart into elements or smaller compounds.
Example Equation: CO2 -----> C + O2
Electrical conductivity, odor and chemical reactivity
What are physical and chemical properties of matter? Electrical conductivity and odor = physical properties and Chemical reactivity = chemical properties
Two hydrogen atoms combined
What is an example of a covalent bond?
Use Appendix 1 from the Unit 3 Foldable to answer this one. Aluminum has this many valence electrons
What are three valence electrons?
What is the temperature increases?
This law is the reason why we must balance equations
What is the law of conservation of matter?
Major difference between physical and chemical properties of matter.
Chemical properties are observed as a substance or substances change into different forms of matter during chemical reactions (creating new substances), and physical properties are observable with only the form of the matter changing (solid, liquid and gas)
What is an ionic bond?
Explain Lewis Dot Diagrams
Temperature does this during an exothermic reaction
What is the temperature decreases?
Products combine together to form
What are reactants?
Highly reactive group of elements in the Periodic Table
What is group number 17? Including the elements fluorine, chlorine, bromine, iodine, astatine.
Water has a special type of bond known as
What is a polar covalent bond?
Valence electrons are important because
Without valence electrons atoms and elements could not bond, combine and react with one another to form new compounds and molecules.
This is released or absorbed during endothermic and exothermic reactions
What is energy?
What is the mass?