atomic number and atomic mass
Flashcard
•
Chemistry
•
6th - 12th Grade
•
Practice Problem
•
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 atom's isotopes, measured in atomic mass units (amu).
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.
4.
FLASHCARD QUESTION
Front
What is the charge of a proton?
Back
A proton has a positive charge.
5.
FLASHCARD QUESTION
Front
What is the charge of an electron?
Back
An electron has a negative charge.
6.
FLASHCARD QUESTION
Front
What is the charge of a neutron?
Back
A neutron has no charge (it is neutral).
7.
FLASHCARD QUESTION
Front
If an atom has 6 protons, what is its atomic number?
Back
The atomic number is 6, which identifies the element as carbon.
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