Isotopes Slides

ISOTOPES

Atoms with the same number of protons and a

different number of neutrons

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What stays the same in isotopes ?

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What is different in isotopes?

ISOTOPE NOTATION:

Multiple Choice

What does the 14 represent in the isotope notation?

• atomic number

• protons

• electrons

• Mass Number

Labeling

Label the Isotope Notation correctly

Drag labels to their correct position on the image

symbol

atomic number

mass number

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How many protons does Li have?

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How many electrons does Li

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How many neutrons does Li have

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?