What is the atomic number of an element?
Atomic Structure

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•
Science
•
9th 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
What are protons?
Back
Protons are subatomic particles found in the nucleus of an atom that have a positive charge.
3.
FLASHCARD QUESTION
Front
What are electrons?
Back
Electrons are subatomic particles that have a negative charge and are found in the electron cloud surrounding the nucleus.
4.
FLASHCARD QUESTION
Front
What are neutrons?
Back
Neutrons are subatomic particles found in the nucleus of an atom that have no charge (neutral).
5.
FLASHCARD QUESTION
Front
How do you determine the number of electrons in a neutral atom?
Back
In a neutral atom, the number of electrons is equal to the number of protons.
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
What is an isotope?
Back
Isotopes are variants of the same element that have the same number of protons but different numbers of neutrons.
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