Isotopes & Bohr Diagrams Flashcard

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons, resulting in a different mass number.

Front

How do you represent an isotope in notation?

Back

Isotope notation is represented by the chemical symbol of the element, with the mass number as a superscript and the atomic number as a subscript.

Front

What is the mass number of an element?

Back

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

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in the nucleus of an atom and defines the element.

Front

How many electrons does helium have in its Bohr diagram?

Back

Helium has two electrons in its Bohr diagram, both in the first energy level.

Front

What is the significance of the first energy level in a Bohr diagram?

Back

The first energy level can hold a maximum of two electrons, which are closest to the nucleus.

Front

What does a Bohr diagram illustrate?

Back

A Bohr diagram illustrates the arrangement of electrons in an atom, showing the energy levels and the number of electrons in each level.

Front

How does the Bohr model differ for hydrogen and helium?

Back

In hydrogen, there is one electron in the first energy level, while in helium, there are two electrons in the same level.

Front

What is the average atomic mass?

Back

The average atomic mass is calculated by multiplying the mass of each isotope by its natural abundance and summing these values.

Front

What is natural abundance in the context of isotopes?

Back

Natural abundance refers to the relative proportion of each isotope of an element found in nature.