Matter
The smallest unit of an element is?
Atom
Elements and compounds are classified as what?
Pure Substances
How do we classify elements
By physical and chemical properties
Uniform in appearance and single phase of matter
Pure substance
This type of mixture does not have a uniform composition?
Heterogenous
Made up of one or more of the same kind of atom chemically combined?
Compound
True or False
All elements on the periodic table are considered "Pure Substances."
True
On the periodic table elements are classified how?
Metals, non-metals and metalloids
Non-uniform appearance with visibly different components or objects
Heterogenous mixture
This type of mixture's substances are evenly spread throughout?
Homogenous
Which state of matter has the lowest kinetic energy?
Solid
Pure substances are made up of how many types of particles?
One
Where are rare earth elements found on the periodic table?
Near the bottom (rows 6 and 7)
Does not have the ability to be separated into simpler substances.
Pure Substance or atoms
Composed of only one type of atom, considered pure, cannot be separated, represented by a chemical symbol.
An element
Contains a variety of elements and compounds that are not chemically combined.
A mixture
How can you change a pure substance?
A chemical change
What type of element is located on the staircase of the periodic table?
Metalloids
Use filtration to separate components of a mixture
Heterogenous mixture
A change in color, temperature, odor, production of a precipitate, production of a gas are all.....
Indicators of a chemical change
Which state of matter shows the greatest changes in volume with changes in temperature and/or pressure?
Gases
How do you know water is a compound?
It has more than one atom
Brittle, not hard, dull, poor conductor of heat and electricity are all properties of what type of element?
Non-metal
How do you separate salt from water?
Distillation or evaporation
When two liquid substances are mixed together in a beaker and solid particles form and fall to the bottom. What are the particles called and what type of change is this?
Precipitate - chemical change