Atomic Theory Review Flashcard
Flashcard
•
Science
•
7th Grade
•
Hard
+2
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
Who was the first scientist to propose atomic theory?
Back
John Dalton
2.
FLASHCARD QUESTION
Front
What two particles contribute to the atomic mass number?
Back
Protons and Neutrons
3.
FLASHCARD QUESTION
Front
What is the charge of a proton?
Back
Positive
4.
FLASHCARD QUESTION
Front
What is the basic unit of matter?
Back
Atom
Tags
NGSS.MS-PS1-1
5.
FLASHCARD QUESTION
Front
What is the atomic number of an element?
Back
The number of protons in the nucleus of an atom.
6.
FLASHCARD QUESTION
Front
Who discovered the proton in 1911?
Back
Ernest Rutherford
7.
FLASHCARD QUESTION
Front
What is the atomic mass number of an atom?
Back
The total number of protons and neutrons in the nucleus.
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