Elements vs Compounds
Is Na (sodium) an element or compound?
Element
Is salt water a pure substance, or a mixture?
Mixture
What are the 4 states of matter?
Solid, Liquid, Gas, Plasma
True or False: A physical change affects the chemical identity of a substance?
False
Is volume an intensive or extensive property?
Extensive
Is water an element or compound?
Compound
Homogeneous mixture
What is true about the volume of a gas?
It is indefinite.
What type of property is flammability?
Chemical
What is on the right side of the arrow of a chemical reaction?
A + B -> C
Products
How many elements are on the periodic table?
118
True
What happens to energy as you go from
solid -> liquid -> gas?
Increases
True or False: Intensive properties are useful for identifying substances.
True
Endothermic means your system is doing what?
Absorbing Energy
Which of the following is 3*CH4O2 ?
A compound
Molecules of an element
Molecules of a compound
Which separation method uses various boiling points to separate liquids?
Distillation
What happens to the distance between atoms as you go from liquid -> solid?
Decreases
The amount of material
All physical AND chemical changes involve a loss or gain of what?
Energy
What happens to the properties of elements when they combine to form a compound?
They form new properties
Chromatography separates liquids based on what?
Solubility
What is the difference between the volume and shape of a gas and a plasma?
There is no difference.
A color change observed when combining two substances is an example of a _____ property undergoing a ______ change.
Physical, Chemical
When burning a candle and watching the wax melt, what type of reaction is it if the candle is my system.
Endothermic