Organizing Elements Flashcards
Who is Dmitri Mendeleev?
He is the first chemist to create an accepted version of the periodic table
How was the first periodic table arranged by in elements?
It was arranged in increasing atomic mass
What is the atomic mass of an element?
It is the average mass of all its isotopes of that element
What is a periodic table?
The periodic table is an arrangement of elements in increasing atomic number.
What is the modern periodic table?
The modern periodic table is a reorganized periodic table in order of increasing atomic number.
Who arranged the modern periodic table?
Henry Moseley
What is a chemical symbol?
It is an abbreviation for the element’s name
How do you calculate the average atomic mass of an object?
(mass x abundance) + (mass 2 x abundance 2) / 100
How is the periodic table divided?
Metals, non metals, metalloids.
What is the row and column of the periodic table?
A row is called a period. A column is called a group or family
