The Periodic Table Flashcards
When did Mendeleev publish his first periodic table of elements?
1869
What did Mendeleev arrange the elements in?
Relative atomic mass and then those with similar properties
What did Mendeleev do to classify his work?
-left gaps for undiscovered elements
-switched the order of a few elements to keep the groups consistent
How are the elements arranged in the modern periodic table?
Atomic number
What are rows called?
Periods
What are vertical columns called?
Groups
What is electronic configuration?
The way in which electrons are arranged in an atom
Give the links of electronic configuration of an element to its position on the periodic table
-number of shells is the period number that element is situated in
-number of electrons in outer shell=group number
-total number of electrons in all shells=atomic number
Why do the elements in the same group have similar chemical properties?
They have the same number of electrons in their outer shell