History of Periodic Table
Shows the element's name, atomic number and mass, symbol
What is the element key?
The ________________increases by one as you move left to right on the periodic table.
What is atomic number?
All but one of the elements in groups 1-12 are metals
What is Hydrogen?
What are the names of the two groups that are the most reactive groups of the periodic table of elements?
What are Alkali Metals, Alkaline Earth Metals
A property that defines a metal's ability to reflect light
What is luster?
By the early 1900's, Mosely solved the organization of the periodic table by arranging the elements by...
What is in rows according to increasing atomic number
As you go from left to right on the periodic table, the pattern of ___________ increases and then decreases
What is melting point?
Except for mercury, all metals are ______ at room temperature
What are solids?
Elements that have higher melting points, greater strength and higher densities than all metals
What are Transitional Metals?
The ability to conduct thermal energy and electricity
What is conductivity?
How is the periodic table arranged today?
What is atomic number?
This term means "repeating pattern"
What is periodic?
Element that occurs in pure form not in a compound
What is Free Element?
Metals in the same _____ of the periodic table usually have very similar properties
What is Group?
The ability to be pulled into thin wires
What is ductility?
Dimitri Mendeleev classified elements according to their atomic __________?
What is Atomic Weight or Mass
Is the melting point of Carbon higher or lower than lithium?
What is higher?
Which element has 56 as its atomic number?
What is Barium?
Elements in group 2 on the period table are called
What are Alkaline Earth Metals?
The ability to be hammered or rolled into thin sheets
What is malleability?
Who is credited for the creation of the periodic table which we use today?
Who is Dimitri Mendeleev?
Metallic properties ____________ as you go from right to left across a period and ___________ as you go from top to bottom of a family.
What is increase?
Name the three elements that are metals in period 3 on the periodic table.
What are Sodium, Magnesium and Aluminum?
Elements in these groups are used to make strong magnets and are used for fuel in some nuclear reactors
What are Lanthanide and Actinide Series?
Name the three metallic properties
What are luster, malleability and electrical conductivity?