What is the ability to dissolve in water and to conduct electricity ?
physical properties
chemical properties
Water is an example of ...
an element
a homogeneous mixture
a compound
When matter changes the most common form of energy released or absorbed is ELECTRICAL ENERGY
New substances are always formed when matter undergoes a
Chemical Change
Physical Change
Chemical energy is the energy
stored in the bonds between atoms
of moving, electrically charged particles
What is matter?
anything that has mass but doesn't take up space
anything that has mass and takes up space
What is a chemical property?
properties that change into different substances
properties that shange shapes and substances
What is an element?
pure substances that cannot be broken down into other substances
pure substances that are able to break down into other substances
substances that turn into compounds when combined
What does the law of conservation of matter state.
matter cannot be created or destroyed
matter cannot be created but it can be destroyed
matter can be created but it can't be truly destroyed
What is an endothermic reaction?
change in which heat is taken
change in which energy is taken
What are the three ways that compounds and mixtures differ?
When elements are combined they form compounds having properties different from the uncombined elements each substance in a mixture has individual properties. Also, the parts of a mixture are not combined in a set ratio.
When elements are combined they form compounds having properties different from the uncombined elements each substance in a mixture has individual properties. Also, the parts of a mixture are combined in a set ratio.
How does a physical change differ from a chemical change?
A physical change change in shape but is the same substance after the change. However the chemical change turns into a new substance.
How are changes in matter related to changes in energy? Changes in matter are related to changes in energy because the substances change.
How do you know that the burning of candle wax is an exothermic change? The burning of candle wax is an exothermic change because it produces carbon dioxide,water, and heat.
If two mixtures are mixed and the temp rises, did it absorb or release thermal energy? It realeased thermal energy because the heat was let out and made the temperature rise.
What is the ratio of phosphorus atoms to oxygen atoms in the compound? The ratio is two to four
