12-5 LATE -30 Isotopes & Average Atomic Mass

Front

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

Back

Mass number.

Front

What happens if a proton is added or removed from an atom?

Back

It becomes a different element.

Front

Different isotopes of an element contain different numbers of what?

Back

Neutrons.

Front

What is the average atomic mass of an isotope with 30% at 4 amu, 20% at 5 amu, and 50% at 3 amu?

Back

4 amu.

Front

How many neutrons are in 1 atom of Carbon-13?

Back

7.

Front

Define an isotope.

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

How do you calculate average atomic mass?

Back

Multiply the mass of each isotope by its relative abundance and sum the results.

Front

What is the significance of the mass number?

Back

It represents the total number of protons and neutrons in an atom.

Front

What distinguishes one element from another?

Back

The number of protons in the nucleus.