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Organizing Elements
Periodic Trends
Metal, Nonmetal or Metalloid
Classifying
Periodic Trends II
100
He was the first person to organize the elements into Triads.
Who is JW Dobereiner?
100
An ion with a positive charge
What is a cation?
100
Generally good conductors of heat and electrical current.

What are metals?

100
Name of the group 1 elements.
What are alkali metals?
100
One half of the distance between the nuclei of two atoms of the same element when the atoms are joined.
What is atomic radius?
200
This is how many known elements that were discovered by 1700.
What is 13?
200
A negatively charged ion.
What is an anion?
200
Generally poor conductors of heat and electrical current.
What are nonmetals?
200
Brittle, metallic elements found in group 2.
What are Alkaline Earth metals?
200
Atomic size generally does this across a period.
What is decreases?
300
He arranged the elements in his periodic table in order of increasing mass.
Who is Mendeleev?
300
The energy required to remove the first electron from an atom?
What is ionization energy?
300
Generally has properties similar to metals and nonmetals.
What are metalloids?
300
Fluorine, Chlorine and Iodine are examples of these group 17 elements known as this.
What are Halogens?
300
Atomic size generally does this down a group.
What is increases?
400
A repeating pattern of properties/characteristics.
What is periodic law?
400
The ability of an atom of an element to attract electrons when the atom is in a compound.
What is electronegativity?
400
These are found on the left side of the periodic table and are the most abundant.
What are metals?
400
Elements that have a full octet, 8 electrons on its outer shell, that rarely take part in a reaction.
What are noble gases?
400
Group 2 elements lose 2 electrons to have this charge.
What is positive 2 (+2)?
500
In the modern periodic table, elements are arranged in order of increasing this.
What is atomic number?
500
The reason why ionization energy increases as you move across a period.
What is decreased atomic size or decreased atomic radius.
500
Arsenic is an example of this type of element.
What are metalloids?
500
This group of elements are located in the "d" block.
What are transition metals?
500
Group 15 elements gains electrons to form this charge.
What is negative 3 (-3)?