2.1 Isotope and % abundance 3rd Period

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 atomic mass.

Front

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

Back

To find the number of neutrons, subtract the number of protons (atomic number) from the atomic mass (rounded to the nearest whole number).

Front

What is the isotope symbol format?

Back

The isotope symbol is written as A/Z Element, where A is the atomic mass, Z is the atomic number, and Element is the chemical symbol.

Front

What is the atomic mass of an element?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

How many protons does Carbon have?

Back

Carbon has 6 protons.

Front

What is the significance of the atomic number?

Back

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

Front

What is the difference between Cr-52 and Cr-53?

Back

Cr-52 has 26 protons and 26 neutrons, while Cr-53 has 26 protons and 27 neutrons.

Front

Which isotope of chromium is more abundant?

Back

Cr-52 is the more abundant isotope of chromium.

Front

How many neutrons are in Lithium-6?

Back

Lithium-6 has 3 protons and 3 neutrons.

Front

What is the formula to calculate the average atomic mass of an element with multiple isotopes?

Back

Average atomic mass = (fraction of isotope 1 * mass of isotope 1) + (fraction of isotope 2 * mass of isotope 2) + ...