Isotopes Slides

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

symbol

atomic number

mass number

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

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)

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

Multiple Choice

Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.  The average atomic mass of lead is 207.2.  Which isotope of lead is likely to be the most abundant.

• 204
• 206
• 207
• 208

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?