Period Table History
Who developed the Periodic Table?
Dimitri Mendeleev (father of the periodic table)
What are rows called on the Periodic Table?
Periods
What charge does an electron have?
Negative
Which Scientist proposed that all atoms from an element were identical?
Dalton
What is group 1 called on the Periodic Table?
Alkali Metals
Who edited the order of Mendeleev's table by atomic number?
Henry Moseley
What are columns called on the Periodic Tables?
Groups/Families
What charge does a proton have?
positive
Which scientist proposed the quantum model of the atom?
Erwin Schrödinger
What is group 2 called on the Periodic Table?
Alkaline Metals
Why were there blank spaces left for elements on the periodic table?
To have spaces for undiscovered elements
What are the elements ordered by on the Periodic Table?
Atomic Number
What charge does a neutron have?
Negative
What model did Thomson discover?
Plum pudding model
What column is made up of Noble Gases on the Periodic Table?
8
What does the word "periodic" mean?
It means pattern.
Where do metals fall in relation to the staircase on the Periodic Table?
What is the number of protons in the nucleus and electrons in the neutral atom represented by?
Atomic Number
Who discovered the first subatomic particle?
Thomson
What is group 7 called on the Periodic Table?
Halogens
Which Scientist proposed that all atoms from an element were identical?
Rutherford
Metalloids or semimetals are composed of which elements?
Staircase elements: B, Si, Ge, As, Sb, Te, Po, At
What is the weighted average sum of protons plus neutrons in the nucleus?
Atomic Mass
Who used the Cathode Ray tube to make his discovery?
Thomson
What are the names of the last two rows of the periodic table called?
Lanthanide Series and Actinide Series