Introduction to the Modern Concept of Atomic Structure

I. VIDEO ON THE MODERN CONCEPT OF ATOMIC STRUCTURE

A. What's the Difference Between Mass Number and Atomic Mass

B. Practice Problems: Net Charge, Mass Number, Atomic Number

II. NOTES ON THE MODERN CONCEPT OF ATOMIC STRUCTURE

An element in the Periodic Table is typically presented in the format below

In order to specify a particular isotopic form of an element, scientists use the following notation

or the standard format being

MASS NUMBER= number of protons and neutrons

ATOMIC NUMBER= number of protons

By having this information, one can calculate the following characteristics of an isotopic form an element

• number of protons, neutrons, and electrons

• mass number

• atomic number

III. EXERCISES ON THE MODERN CONCEPT OF ATOMIC STRUCTURE

Click here for the answers