Flashcard Atomic Structure

Front

What are subatomic particles?

Back

Subatomic particles are the smaller constituents of an atom, including protons, neutrons, and electrons.

Front

How many neutrons are in an isotope of uranium with a mass number of 238 and an atomic number of 92?

Back

146 neutrons.

Front

What is the difference between mass number and atomic mass?

Back

The mass number is an integer representing the total number of protons and neutrons, while atomic mass is a weighted average of the masses of an element's isotopes.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

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

What is an atom?

Back

An atom is the smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a proton?

Back

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

Front

What is a neutron?

Back

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

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.