Atomic Structure Flashcard

Front

What are the subatomic particles found in the nucleus of an atom?

Back

Protons and Neutrons.

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the atomic number from the atomic mass.

Front

What is the atomic mass of Magnesium?

Back

24.305 amu.

Front

How many neutrons are in Magnesium?

Back

12.

Front

What is the atomic number of Sulfur?

Back

16.

Front

How many electrons are in a neutral atom of Sulfur?

Back

16.

Front

What is the average atomic mass of an element?

Back

It is the weighted average of the masses of an element's isotopes.

Front

How do you find the average atomic mass given the percentage and mass of isotopes?

Back

Multiply the mass of each isotope by its relative abundance (as a decimal) and sum the results.

Front

What is the formula for calculating average atomic mass?

Back

Average Atomic Mass = (mass1 * %1) + (mass2 * %2) + ...

Front

What is the significance of the atomic number?

Back

It represents the number of protons in an atom and defines the element.