INV#02 H. Atomic Theory Review 2024

Front

What is the atomic theory?

Back

The atomic theory states that matter is composed of discrete units called atoms, which are the basic building blocks of matter.

Front

What is the mass number of an atom?

Back

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

Front

How do you calculate the number of neutrons in an isotope?

Back

Number of neutrons = Mass number - Atomic number.

Front

What is the electron configuration for Nitrogen?

Back

1s² 2s² 2p³.

Front

What is the average atomic weight?

Back

The average atomic weight is the weighted average of the masses of an element's isotopes, based on their natural abundance.

Front

What is the relationship between frequency and energy?

Back

Frequency and energy have a direct relationship; as frequency increases, energy increases.

Front

What is the definition of an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the atomic number?

Back

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

Front

What is the formula for calculating average atomic mass?

Back

Average atomic mass = (mass of isotope 1 × % abundance) + (mass of isotope 2 × % abundance) + ...

Front

What does the term 'percent abundance' refer to?

Back

Percent abundance refers to the relative amount of each isotope of an element found in nature.