Isotopes and Calculating Atomic Mass

Front

What is located in the 'A' position of a correctly written isotope symbol?

Back

Mass number

Front

Which isotope of lithium has 4 neutrons?

Back

Li-7

Front

How many neutrons does the isotope 89Kr have?

Back

53 neutrons

Front

If an isotope has three forms with 30% at 4 amu, 20% at 5 amu, and 50% at 3 amu, what is the average atomic mass?

Back

4 amu

Front

How many protons are in the isotope of titanium?

Back

22 protons

Front

Define an isotope.

Back

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

Front

What is atomic mass?

Back

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

Front

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

Back

Number of neutrons = Mass number - Atomic number.

Front

What is the atomic number of an element?

Back

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

Front

What is the significance of mass number in isotopes?

Back

Mass number indicates the total number of protons and neutrons in an atom's nucleus.