1st semester final review #4: Atomic Theory/Waves/Isotopes

Front

What is the mass number of an atom?

Back

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

Front

How do you calculate the mass number of an isotope?

Back

The mass number of an isotope is calculated by adding the number of protons and neutrons in its nucleus.

Front

What does the atomic number of an element represent?

Back

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

Front

What is the average atomic mass of an element?

Back

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

Front

Define wavelength in the context of waves.

Back

Wavelength is the distance between two successive peaks (or troughs) of a wave.

Front

What is the relationship between frequency and wavelength?

Back

Frequency and wavelength are inversely related; as the frequency increases, the wavelength decreases, and vice versa.

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.

Front

How many protons are in an aluminum atom?

Back

An aluminum atom has 13 protons.

Front

What is the significance of Avogadro's number?

Back

Avogadro's number (6.022 x 10^23) is the number of atoms, ions, or molecules in one mole of a substance.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while mass number is the total count of protons and neutrons in a specific isotope.