DE_Chem_2.1.2-5
Presentation
•
Science
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9th Grade
•
Practice Problem
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Hard
+6
Standards-aligned
NickBeth Meyer
Used 16+ times
FREE Resource
14 Slides • 6 Questions
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What's different about these three isotopes?
3
Fill in the Blanks
An atom of the same element with the same number of protons but a different number of neutrons is called an
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Open Ended
How are these three hydrogen isotopes different?
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Protons = 1 amu
Neutrons = 1 amu
Electrons = negligible
Atomic Mass Unit (amu)
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Symbol with atomic mass and number
Element with atomic mass only
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Fill in the Blanks
Hydrogen-1 has an atomic number of 1 and a mass number of 1, so the number of neutrons in a hydrogen atom is calculated to be _. (Type a numeric response)
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Fill in the Blanks
Gold-197 has a mass number of 197 and an atomic number of 79, which means it has
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What is listed in the Periodic Table
It is a weighted average mass of a particular element
Average Atomic Mass
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multiply (%abundance)(mass of isotope) for each isotope
add them all
divide by 100
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Fill in the Blanks
What is the average atomic mass for the following isotopes?
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Match
Match the following
the weighted average of the atomic mass of each isotope of the element, in proportion to the percentage of each isotope of the element occurring in nature
the total number of neutrons and protons in an atom
the number of protons in the nucleus of an atom
Atomic mass
Mass number
Atomic number
Atomic mass
Mass number
Atomic number
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