Unit 3- Atomic Structure

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

How do you determine the number of protons in an element?

Back

The number of protons in an element is equal to its atomic number, which is unique to each element.

Front

What is the electron configuration of an atom?

Back

The electron configuration of an atom describes the distribution of electrons in atomic orbitals, following the Aufbau principle, Hund's rule, and the Pauli exclusion principle.

Front

What is the shorthand notation for electron configuration?

Back

Shorthand notation for electron configuration uses the nearest noble gas to represent core electrons, followed by the valence electrons.

Front

What does the symbol [Xe] represent in electron configuration?

Back

The symbol [Xe] represents the electron configuration of the noble gas Xenon, which is used as a shorthand for core electrons.

Front

How many electrons can the s orbital hold?

Back

The s orbital can hold a maximum of 2 electrons.

Front

What is the maximum number of electrons that can occupy the p orbital?

Back

The p orbital can hold a maximum of 6 electrons.

Front

What is the significance of the atomic mass number?

Back

The atomic mass number is the total number of protons and neutrons in an atom's nucleus, which determines the isotope of the element.

Front

What is the difference between atomic number and mass number?

Back

The atomic number is the number of protons in an atom, while the mass number is the sum of protons and neutrons.

Front

What is the electron configuration for a sulfur atom?

Back

The electron configuration for a sulfur atom is [Ne] 3s² 3p⁴.