Mrs. Kim's Atomic Structure

Front

What is the weighted average atomic mass?

Back

The weighted average atomic mass is the average mass of an element's isotopes, calculated by multiplying the mass of each isotope by its natural abundance and then summing the results.

Front

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

Back

Multiply the mass of each isotope by its natural abundance, then add the results.

Front

What are isotopes?

Back

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

Front

Why do isotopes of the same element have different mass numbers?

Back

Because they have different numbers of neutrons.

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 the atomic number of an element with 17 protons?

Back

17.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

Which of the following is not a subatomic particle?

Back

Molecule.

Front

What does the atomic number of an element represent?

Back

The number of protons in the nucleus.

Front

What is a proton?

Back

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