Isotopes and Atomic Mass
Authored by Raymond Mitchel Africa
Science
6th - 10th Grade
Used 2+ times
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33 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Calculate the atomic mass for carbon using the following data:
15.236 amu
12.011 amu
14.547 amu
10.396
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Nitrogen has two isotopes. One has an atomic mass of 14.003 amu and a relative abundance of 99.63% while the other isotope has an atomic mass of 15.000 amu and a relative abundance of 0.37%. What is the average atomic mass for nitrogen?
14.107 amu
14.407 amu
14.007 amu
14.907 amu
3.
FILL IN THE BLANKS QUESTION
30 sec • 1 pt
The atomic mass of the isotope copper- (a) is 62.930 amu.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The atomic mass of magnesium from the Periodic Table is 24.31 amu. What does this mass represent?
the atomic mass of the most abundant isotope of magnesium
the weighted average of the two most abundant isotopes of magnesium
the weighted average of all of the naturally occurring isotopes of magnesium
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Most elements occur in nature as a single isotope.
TRUE
FALSE
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The average atomic mass for an element can be easily calculated by taking the average of the atomic mass units of each isotope.
TRUE
FALSE
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculations of atomic mass use the percent abundance of each isotope.
TRUE
FALSE
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