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It's all in the Family!
Is that your Property?
How we know what we know...
Isn't that Amazing?
Life is just Chemistry
100
Elements in the same family tend to have the same number of _?_. An exception to this rule is Helium.
valence electrons (v.e.-)
100
At room temperature, most elements are _?_. Many of these elements are classified as _?_.
Solids, metals
100
This awesome Russian is credited with discovering Periodic Law
Dmitri Mendeleev
100
Semiconductors are also called _?_. Adding substances to semiconductors to make them work better is called _?_.
Metalloids; doping
100
All of the gases in our atmosphere can be classified as _?_ elements. On the periodic table, we find these elements in what general area?
Non-metal; upper right
200
Group One elements (except H) are called _?_ and have _?_ valence electrons.
Alkali Metals; 1
200
All metals are solids except _?_. All gases can be classified as _?_. Of these gases, Group _?_ are known as noble gases because they are unreactive (inert)
mercury (Hg), non-metals; 18
200
Dobereiner's classification system was based on groups with similar properties. He called his groups _?_. He suggested that the similar properties of elements in his groups were related to an element's _?_
Triads; atomic mass
200
To make an n-type semiconductor, the metalloid would be doped with an element with _?_ valence electrons. To make a p-type, the doping element must have _?_ v.e.
5, 3
200
Coal is made mostly of the element _?_. This element is found in all living organisms. It is also the element that when exposed to extreme heat and pressure can form diamonds.
Carbon
300
Elements in the same _?_ have the same number of valence electrons. An exception to this is _?_ because _?_
Group/Family; Helium; it is too small and can only hold 2
300
Name at least 1 chemical property and 1 physical property that make transition metals good for coins.
Chemical: fairly unreactive; Physical: malleable
300
The blanks in Mendeleev's periodic table represented _?_. In one of these blanks, he predicted the _?_ of germanium by looking at the elements which surrounded it on his periodic table.
undiscovered elements; properties
300
Give the general area of the periodic table where you would find each of the following: 1) metals 2) transition metals 3) non-metals 4) metalloids 5)inner transition metals
1) left and center; 2) middle 3) right 4) along zig-zag line 5) below the main p.t.
300
Shape memory metals are AMAZING! List at least 3 uses for these types of metals.
Robots, braces, bra underwires; Mars Rover solar panels; stints
400
Although _?_ appears to be in Group One on the periodic table, it is NOT a metal. Instead, it is a very reactive _?_
Hydrogen (H); non-metal or gas
400
Name 3 physical properties of solid non-metals
brittle, many colors, insulators (do not conduct heat/electricity)
400
Dobereiner and Mendeleev based their early attempts at a periodic table on increasing _?_. These attempts put MOST of the elements with similar properties in the same _?_.
atomic mass; row
400
The modern periodic table is arranged by increasing _?_. This gives the table its _?_ which means the regular and repeating pattern of chemical and physical properties because now elements in vertical columns have the same number of _?_
atomic number; periodicity; valence e-
400
Look at your periodic table. Beginning at Hydrogen, count down 4 elements and then over 1. Give the group #, period #, classification, Lewis Dot Structure, Outermost Energy level and properties of this element.
The element is Calcium (Ca). Group number = 2; period number = 4; classification is metal (specifically alkaline earth metal); Lewis Dot structure is Ca with 2 dots; Outermost Energy level = 4; properties = very reactive, silver/white metal
500
Elements in Group 17 are called _?_. This term means, "salt-former". Elements in Group 1 are called _?_ and elements in Group 2 are called _?_
Halogens; Alkali Metals; Alkaline Earth Metals
500
Let's imagine that you have a sample of a solid substance and that you experiment with it. Your results are that the substance does not conduct heat or electricity. How many valence electrons do you think this substance must have? 1,2,3, or 4? Why?
4. It can't be a metal, so it can't be 1, 2 or 3.
500
Mendeleev was able to predict properties of elements that had yet to be discovered. How did he do it? (We did the same thing in lab...)
Looked at the 4 elements on the periodic table that would surround the undiscovered element and average their properties together
500
Every row (called a _?_ or series) except the first one begins with a _?_ and ends with a _?_. This is an example of _?_
period; metal; nonmetal; periodicity
500
What is "periodic" about the periodic table? Why is the periodic table, periodic?
Regular and repeating pattern of physical and chemical properties; Each group has the same number of valence e- so members of that group behave alike