02b - Atomic Number and Atomic Mass

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•
Physics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the atomic number of an element?
Back
The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.
2.
FLASHCARD QUESTION
Front
What is atomic mass?
Back
Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).
3.
FLASHCARD QUESTION
Front
Where is most of the mass of an atom located?
Back
Most of the mass of an atom is contained in the nucleus.
4.
FLASHCARD QUESTION
Front
What subatomic particles are found in the nucleus of an atom?
Back
Protons and Neutrons.
5.
FLASHCARD QUESTION
Front
How do you calculate the number of neutrons in an atom?
Back
Number of Neutrons = Mass Number - Atomic Number.
6.
FLASHCARD QUESTION
Front
What is the mass number of an atom?
Back
The mass number is the total number of protons and neutrons in the nucleus of an atom.
7.
FLASHCARD QUESTION
Front
How many electrons does a neutral atom have?
Back
A neutral atom has the same number of electrons as protons.
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