Flashcard Atomic Structure

Front

What is the weighted average atomic mass of an element with isotopes of mass 10 amu (90% abundance) and 12 amu (10% abundance)?

Back

10.2 amu

Front

What does the atomic number of an element represent?

Back

The number of protons in the nucleus.

Front

What are isotopes of an element?

Back

Atoms with the same number of protons but different numbers of neutrons.

Front

How is the atomic mass of an element calculated?

Back

By adding the number of protons and neutrons.

Front

Which of the following are subatomic particles?

Back

Protons, Neutrons, Electrons.

Front

Define an atom.

Back

The smallest unit of an element, consisting of protons, neutrons, and electrons.

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.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average of all isotopes, while mass number is the total number of protons and neutrons in a specific isotope.