Development of Periodic Table
The man who published the first periodic table of elements.
Dmitri Mendeleev
Groups 1,2, and 13-18 are part of this classification.
representative elements
all the elements in group 3-12 are known as this.
transition elements
The rows of the periodic table are called this
periods
This element if found in table salt and is part of the alkali family
sodium
Mendeleev used this to organize his periodic table.
atomic mass
Another name for Group 1 which are silvery solids that are very reactive in water.
Alkali Metals
these elements belong in the Iron Triad
iron, cobalt, and nickel
The columns of the periodic table are called this
groups or families
This element seems out of place on the periodic table and means "water former"
hydrogen
This physicist improved on Mendeleev's periodic table.
Henry Moseley
Another name for Group 2 elements that are more dense than Group 1 and less reactive.
Alkaline Earth Metals
The lanthanides and actinides are part of this group
inner transition elements
The left side of the periodic table are all of this.
metals
This element is known as "liquid silver"
mercury
Moseley organized his periodic table using this.
atomic number
This family or group reacts readily with group 1 alkali metals to form salts.
halogens or group 17
These elements are soft metals that can be cut with a knife.
lanthanides
The right side of the periodic table are all of this
nonmetals
This element is the building block of all living things
carbon
The modern periodic table is organized into these two items.
periods and group
this group or family is very stable because of their outer electron configuration
noble gases or group 18
Many of these elements are synthetic and all of them are radioactive.
actinides
These fall in between the metals and nonmetals
metalloids
This element is solid at room temperature but turns to liquid at 85 degrees F.
Gallium