Atoms and Elements

Flashcard
•
Science
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the atomic mass of an element?
Back
The atomic mass of an element is the weighted average mass of the atoms in a naturally occurring sample of the element, typically measured in atomic mass units (amu).
2.
FLASHCARD QUESTION
Front
What are the three main subatomic particles of an atom?
Back
The three main subatomic particles of an atom are protons, neutrons, and electrons.
3.
FLASHCARD QUESTION
Front
What is the charge of an electron?
Back
An electron has a negative charge.
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 a neutron?
Back
A neutron has no charge (it is neutral).
6.
FLASHCARD QUESTION
Front
What is the nucleus of an atom?
Back
The nucleus is the central part of an atom, containing protons and neutrons.
7.
FLASHCARD QUESTION
Front
What is an atomic number?
Back
The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.
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