Scientists
Definitions
Groups/Families
Periodic Trends
Miscellaneous
100
This scientist grouped elements into triads
Who is Dobereiner
100
Triad
Set of three elements with similar properties
100
Group 1A and one characteristic
Alkali Metals; highly reactive; soft; low melting point
100
What happens to the atomic size as you move from top to bottom?
Atomic size increases
100
Write the electron configuration for the element in period 1 of the Noble Gases
1s2
200
This chemist was the first to publish an organized table of elements in the 1860s
Who is Mendeleev
200
Anion
An ion with a negative charge
200
Group 2A
Alkaline Earth Metals; found in nature; combines with other elements
200
If you look at an original atom and its cation, which will be larger?
The original atom; cations are smaller than the original atom
200
Which particle has a larger radius in the atom / ion pair below? I and I-
I- (it is an anion - it gains an electron and has a negative charge)
300
This scientist discovered the atomic number for each known element
Who is Moseley
300
Cation
An ion with a positive charge
300
Group 7A
Halogens; nonmetals; very reactive; found in sea water; dissolved in drinking water
300
If you look at an original atom and its anion, which will be smaller?
The original atom; anions are always larger than the original atom
300
Which particle has a larger radius in the atom / ion pair below? Al, Al3+
Al (Al3+ is a cation as it tends to lose electrons and has a positive charge; it is smaller than the original Al atom)
400
This scientist based his periodic table on a card game similar to solitaire
Who is Mendeleev
400
Electronegativity
The ability of an atom of an element to attract electrons when the atom is in a compound.
400
Group 8A
The Noble Gases; nonmetals; odorless and colorless gases
400
What happens to the electronegativity as you move from left to right on the periodic table?
The electronegativity increases
400
What is another way (besides the American, European, and IUPAC labeling) to classify elements?
metals, nonmetals, metalloids
500
When Mendeleev created his periodic table, what is one thing that he did?
Left blank spaces for unknown elements
500
Periodic Law
When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties
500
What is the difference between the transition metals and inner transition metals?
Their location (transition metals found in main body of the PT; inner transition metals found below the main body of the PT)
500
What happens to the nuclear charge as you move from top to bottom on the PT? Left to right?
It increases as you move top to bottom and increases as you move left to right
500
Identify an element that is considered a metal, an element considered a nonmetal and an element considered a metalloid
metal: Fe nonmetal: He metalloid: B
M
e
n
u