Atomic Math Calculations

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Presentation transcript:

Atomic Math Calculations

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

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?

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

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

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

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

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?