Atomic Mass Calculation Quiz

Atomic Mass Calculation Quiz

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Jennifer Brown

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main challenge in calculating atomic mass without using percentages?

Understanding the concept of isotopes

Using algebra to solve for variables

Identifying the number of isotopes

Memorizing atomic masses

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What assumption allows us to use only one variable in the equation?

The atomic mass is always given

The total abundance of isotopes is 100%

The isotopes have equal mass

The isotopes are chemically identical

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why do we convert percentages to decimals in the equation?

To match the units of atomic mass

To simplify the calculation

To avoid using fractions

To make the equation more complex

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in setting up the algebraic equation for this problem?

Calculating the average atomic mass

Finding the mass of each isotope

Assigning variables to isotopes

Determining the number of isotopes

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do we express the relationship between the two isotopes' abundances?

X - Y = 1

X * Y = 1

X + Y = 1

X + Y = 0

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the next step after substituting Y with 1 - X in the equation?

Convert decimals back to percentages

Solve for Y

Add the atomic masses

Distribute and simplify the equation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the percent abundance of chlorine-35 after solving the equation?

50%

24.59%

75.41%

100%

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