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Do you speak the Language?
100
The way that elements are arranged in the periodic table
What is atomic number
100
1st family. Highly reactive and are only found in compounds.
What is alkali metals.
100
The two main kinds of changes that can be observed from chemical reactions.
What are formation of new substances and changes in energy.
100
A pure substance made of two or more elements chemically combined in a set ratio.
What is a compound?
100
Anything that has mass and takes up space.
What is matter?
200
the Russian scientist that discovered that the properties of elements followed a pattern.
Who is Dimitri Mendeleev
200
These include shininess, malleability, ductility, and conductivity.
What are the physical properties of metals.
200
Chemical equations use these and other symbols instead of words to summarize a reaction.
What are formulas?
200
A mixture where the different parts can be seen.
What is a heterogeneous mixture?
200
The amount of energy needed to get a chemical reaction started.
What is activation energy?
300
The number of protons and neutrons in an atom
What is atomic number
300
Elements synthesized by particle accelerators.
What are Synthetic Elements?
300
This principal states that the total mass of reactants must equal the total mass of the products.
What is the principal of the conservation of mass.
300
A mixture that is mixed so evenly that you can not see the individual parts. Sometimes known as a solution.
What is a Homogeneous mixture?
300
A system in which no matter is allowed to enter or leave.
What is a closed system?
400
The rows across the Periodic Table that shows that the properties of the elements change according to a pattern.
What are periods.
400
Poor conductors of electricity and heat, and are reactive with other elements. The solids are dull and brittle.
What are the physical properties of non-metals?
400
A reaction that releases energy in the form of heat.
What is an exothermic reaction?
400
The part of the solution that dissolves the other substances.
What is a solvent?
400
A material that increases the rate of a reaction by lowering the activation energy.
What is a catalyst?
500
The vertical columns that contain elements with similar properties or characteristics.
What is a group or a family
500
This group of elements are very useful because of their varying ability to conduct electricity - some are used to make semiconductors.
What are metalloids?
500
Chemists can do "this" by varying factors such as surface area, temperature, concentration, or by using catalysts and inhibitors.
What is controlling the rate of a reaction?
500
A mixture that contains larger particles than a solution. The particles are still too small to see, and they do not settle out. An example is jello.
What is a colloid?
500
A substance that enters into a chemical reaction.
What is a reactant?
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