ISOTOPES

ISOTOPES

Atoms with the same number of protons and a

different number of neutrons

ISOTOPE NOTATION:

Multiple Choice

What does the 14 represent in the isotope notation?

• atomic number

• protons

• electrons

• Mass Number

Labelling

Label the Isotope Notation correctly

Drag labels to their correct position on the image

mass number

atomic number

symbol

Calculate the average atomic mass / atomic weight:

(% abundance of an isotope * mass of isotope)
+(% abundance of an isotope * mass of isotope)
+ (% abundance of an isotope * mass of isotope)

Average atomic mass / weight

% must be

changed to a

decimal

(% IN DECIMAL FORM * MASS) + (% IN DECIMAL FORM * MASS)

Strontium consists of four isotopes with masses of 84 (abundance 0.50%), 86 (abundance of 9.9%), 87
(abundance of 7.0%), and 88 (abundance of 82.6%). Calculate the atomic mass of strontium.

Math Response

Calculate the average atomic mass for Cu-63 with a 50% abundance and Cu-65 with a 47% abundance and Cu-64 with a 3% abundance

Type answer here

Correct Answer: 63.97

Deg^°

Rad

Strontium consists of four isotopes with masses of 84 (abundance 0.50%), 86
(abundance of 9.9%), 87 (abundance of 7.0%), and 88 (abundance of 82.6%).
Calculate the atomic mass of strontium.

Titanium has five common isotopes: 46Ti (8.0%), 47Ti (7.8%), 48Ti (73.4%),

49Ti (5.5%), 50Ti (5.3%). What is the average atomic mass of titanium?