An arrangement of elements in columns, based on a set of properties that repeat from row to row.
What is Periodic Table
100
horizontal row of elements in the periodic table
What is a period
100
Group of elements that play an important role in living organisms, and are also extremely valuable as strong, structural useful materials AND make up the d-block on the periodic table?
What is transition metal
100
He renamed the four roots as elements
What is Plato
100
The year he published the periodic table
What is 1869
200
three classes of metals
What is metal, nonmetal and metalloid
200
elements that are in a column
What is group
200
Elements that are poor conductors of electricity
What is nonmetal
200
first person to discover the noble gases in 1875
Who is Henry Cavendish
200
He arranged the known chemical elements in a table according to increasing
What is mass
300
letter abbreviation of the element
What is Chemical Symbol
300
the number of families in the periodic table
What is 18
300
Elements that are between metal and nonmetal
What is metalloid
300
first person to discover a new element
What is Henning Brand
300
He did not predict this group of elements that were discovered after the first version of table was published
What is the noble gases
400
An electron that is in the highest occupied energy level, the outer shell
What is Valence Electron
400
on periodic table metals are located
What is left side of staircase
400
elements that are nonreactive because their filled valence shells and referred to as inert gases
What is Noble Gas
400
In 1911, Mosely suggested that, rather than atomic mass, the perodic table should be organized by this.
What is the atomic number
400
His periodic table was useful to scientist to predict properties of unknown
What is an element
500
pattern of repeating properties of elements revealed in the periodic table
What is periodic law
500
each element on the periodic table includes 4 types of information.
What is name, symbol, atomic number and atomic mass
500
From left to right across a period in the periodic table, elements are less metallic
What is non metallic
500
Mendeleev left empty spaces on the periodic table for these
What is undiscovered elements
500
This element was named ekasilicon and its atomic mass predicted to be 72.64