Flashcard Atomic Structure

Front

What is the purpose of calculating the weighted average atomic mass?

Back

To represent the average mass of an element's isotopes as found in nature.

Front

How is the atomic mass of an element calculated?

Back

By adding the number of protons and neutrons.

Front

If an isotope of carbon has 6 protons and 8 neutrons, what is its mass number?

Back

14.

Front

What is the mass number of an atom that has 20 protons, 20 neutrons, and 20 electrons?

Back

40.

Front

Which of the following is not a subatomic particle?

Back

Molecule.

Front

Define atomic mass.

Back

The mass of an atom, typically expressed in atomic mass units (amu), which is approximately equal to the number of protons and neutrons in the atom.

Front

What are isotopes?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is a proton?

Back

A positively charged subatomic particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutral subatomic particle found in the nucleus of an atom.

Front

What is an electron?

Back

A negatively charged subatomic particle that orbits the nucleus of an atom.