Isotopes and Average Atomic Mass

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.

Front

What is the average atomic mass?

Back

The average atomic mass is the weighted average of the masses of an element's isotopes, taking into account their relative abundances.

Front

What subatomic particle is electrically neutral?

Back

Neutron.

Front

How many protons does sulfur have?

Back

Sulfur has 16 protons.

Front

How do you calculate the average atomic mass of an element with multiple isotopes?

Back

Multiply the mass of each isotope by its relative abundance (as a decimal), then sum these values.

Front

What is the charge of an atom with 3 protons, 4 neutrons, and 2 electrons?

Back

The atom has a +1 charge.

Front

What is the significance of the atomic number?

Back

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

Front

What is the mass number of an isotope?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

Which isotope of lead is likely to be the most abundant if the average atomic mass is 207.2?

Back

Lead-207 is likely to be the most abundant isotope.

Front

What is the relationship between isotopes and average atomic mass?

Back

The average atomic mass of an element is influenced by the masses and relative abundances of its isotopes.