What is the atomic number of an element?
Determining Protons Electrons Neutrons

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Chemistry
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
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
How many protons are in a gold atom?
Back
79
3.
FLASHCARD QUESTION
Front
What does the atomic mass represent?
Back
The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).
4.
FLASHCARD QUESTION
Front
How many neutrons are in a gold atom?
Back
118
5.
FLASHCARD QUESTION
Front
What is the relationship between protons and electrons in a neutral atom?
Back
In a neutral atom, the number of protons equals the number of electrons.
6.
FLASHCARD QUESTION
Front
How do you calculate the number of neutrons in an atom?
Back
Number of neutrons = Atomic mass - Atomic number.
7.
FLASHCARD QUESTION
Front
What is the atomic mass of Beryllium?
Back
The atomic mass of Beryllium is approximately 9.012.
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