What is the atomic number of an element?
Atomic Structure, Elements, Periodic Table

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•
Science
•
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
What are subatomic particles that have a negative charge?
Back
Electrons are subatomic particles that have a negative charge.
3.
FLASHCARD QUESTION
Front
How do you calculate the mass number of an atom?
Back
The mass number is calculated by adding the number of protons and neutrons in the nucleus of an atom.
4.
FLASHCARD QUESTION
Front
What is the mass number of an atom with 20 neutrons and 19 protons?
Back
The mass number is 39 (19 protons + 20 neutrons).
5.
FLASHCARD QUESTION
Front
Which element has a mass number of 16?
Back
Oxygen has a mass number of 16.
6.
FLASHCARD QUESTION
Front
What is the significance of the periodic table's groups?
Back
Elements in the same group have similar chemical properties due to having the same number of valence electrons.
7.
FLASHCARD QUESTION
Front
What is the difference between atomic number and mass number?
Back
The atomic number is the number of protons, while the mass number is the total number of protons and neutrons.
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