Chemical and Physical Changes/Properties
Color, mass, shape, and density are all examples of what?
Physical Properties
(any characteristic of matter that can be observed or measured without altering the substance’s chemical composition)
In a physical change do you end up with a new substance?
No! Physical change involves alterations in stated of matter, such as melting, boiling etc.
Anything that takes up space is called _________.
Matter
What type of charge to protons have?
Positive
Who created the Periodic Table?
Dmitri Mendeleev
Flammability is an example of what?
Chemical Property
(a characteristic of matter that becomes evident when a substance undergoes a chemical change forming a new substance with a different chemical identity. They require a reaction to be observed!)
In a chemical change can you get it back to its original substance?
No! Chemical change involves conversion of one or more substances into new substances.
What type of charge to neutrons have?
Neutral/Uncharged
The periodic table is a way of ____________ elements according to their unique characteristics, like atomic number, density, boiling point and other values.
Organizing
In a chemical change can you get it back to its original form?
No, chemical change involves conversion of one or more substances into new substances. Burning wood will turn to ash, which cannot turn back into wood.
________ are characteristics of a substance that you can see without changing the identity of the substance.
Physical Properties
The molecules that come together to start a chemical reaction are the _______.
Reactants
What type of charge to electrons have?
Negative
What do different salts do to the appearance of fireworks?
Change colors.
Cutting paper is an example of what?
Physical Change
Cutting paper does not alter the paper's chemical composition.
Physical Change
It changes states of matter!
The _________ is the end result of a reaction.
Products
An ______ is the simplest and smallest particle of matter that still has chemical properties of the element.
Atom
What gas is sometimes used in a fire extinguisher?
Carbon dioxide
Breaking a mirror into pieces is an example of what?
Physical Change
It just changes the physical appearance, nothing chemical is occurring.
Salt dissolving into water is an example of what?
Physical Change- there is now new substance being formed. The process is reversable.
A __________ is any combination of two or more different elements.
Compound
An apple rotting is an example of what?
Chemical Change
The break-down of organic compounds, forming new substances through microbial action (fungi, bacteria-leading to decomposition).