1. Atomic Math Calculations

2. ATOMIC MATH
# OF PROTONS IN AN ELEMENT = THE ELEMENT’S ATOMIC NUMBER. Example 1 How many protons does the element Oxygen contain?

3. ATOMIC MATH
Atomic # determines the element’s position in the periodic table. All atoms are electrically neutral, so the # of protons must = the # of electrons How many protons and electrons does the element oxygen contain?

4. ATOMIC MATH
Neutrons = the atomic mass – the atomic # Example Calculate the amount of neutrons for oxygen, sulfur, and calcium.

5. Atomic Math
Mass number = # of protons + # of neutrons Example Calculate the Mass # for Nickel, Copper, and Gold.

6. Isotopes
Isotopes are atoms that have the same number of protons, but a different number of neutrons.

7. Atomic Mass
Reported atomic masses are weighted averages, based on the relative abundance of naturally occurring isotopes.

8. Example Calculation Potassium has an atomic mass of 39.14. Example
39K has a relative abundance of 93.3%, 40K has a relative abundance of 6.7%. What is the atomic mass of potassium?