Periodic Table History, Organization, Groups & Element Properties
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/43
There's no tags or description
Looks like no tags are added yet.
44 Terms
Who is the father of the Periodic Table?
Dmitri Mendeleev
Who is known as the father of Modern Chemistry?
Antoine Lavoisier
Who changed element symbols to letters?
Jöns Jacob Berzelius
Who developed the concept of Triads?
Johann Döbereiner
What were Triads used for?
To group elements with similar properties into groups of three
Who developed the Law of Octaves?
John Newlands
What was the first method using to classify elements?
Musical octaves / groups of eight
What did Meyer believe was more important than atomic number?
Atomic mass
What final two properties were used in Meyer's table?
Atomic mass and chemical properties
When was Mendeleev's original table published?
1869
How many elements were on Mendeleev's original table?
70
Which group was missing from Mendeleev's table?
Noble gases
What did Mendeleev predict for the blank spots in his table?
The properties of undiscovered elements
Why was Mendeleev's table accepted by 1875?
Gallium was discovered in 1875 and closely matched his predictions
What final properties were used in Mendeleev's table?
Atomic mass and chemical properties
Who discovered the noble gases?
William Ramsay and Lord Rayleigh
Who changed the periodic table to use atomic number?
Henry Moseley
Who added the rare earth series to the modern table?
Glenn T. Seaborg
What increases by one from element to element moving left to right?
Atomic number
Which groups are considered representative elements?
Groups 1A-8A (the A groups)
What are elements going down in the periodic table called?
Group or family
How are elements in the same group identified?
By a number and letter
What do elements in the same group have in common?
Similar physical and chemical properties
What are elements going across the periodic table called?
Period or row
How many rows are on the periodic table?
7
What are the three classes of elements?
Metals, nonmetals, and metalloids
How many metalloids are commonly recognized?
7
What are the three states of matter?
Solid, liquid, and gas
What are the properties of metals?
Shiny, good conductors of heat and electricity, malleable, ductile, usually solids at room temperature
What are the properties of nonmetals?
Usually dull, poor conductors of heat and electricity, often brittle, many are gases at room temperature
What property do metalloids have?
They are semiconductors of electricity
Which group contains the most reactive metals?
Group 1A, the alkali metals
Which group contains the most reactive nonmetals?
Group 7A, the halogens
Which elements have properties similar to iodine?
Bromine (Br) and Chlorine (Cl)
If an element is solid at room temperature and ductile, what is it?
Metal
If an element is a gas at room temperature and has a low boiling point, what is it?
Nonmetal
What is Group 1A called?
Alkali metals
What is Group 2A called?
Alkaline earth metals
What is Group 3B called?
Transition metals
What is Group 7A called?
Halogens
What is Group 8A also known as?
Noble gases
What are the bottom two rows of the periodic table called?
Inner transition metals (rare earth elements)
What are the elements from La to Yb called?
Lanthanides
What are the elements from Ac to No called?
Actinides