
PS 5.1 atomic history
Flashcard
•
Chemistry
•
7th - 8th Grade
•
Practice Problem
•
Hard
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16 questions
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1.
FLASHCARD QUESTION
Front
Who was the first contributor to the atomic theory?
Back
Democritus
2.
FLASHCARD QUESTION
Front
In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.
Back
Atoms
3.
FLASHCARD QUESTION
Front
Which scientist saw the atom as a solid sphere?
Back
Dalton
4.
FLASHCARD QUESTION
Front
What is Neils Bohr's contribution to the atomic theory?
Back
Created a model of the atom with electrons moving around the nucleus in fixed orbits (layers).
5.
FLASHCARD QUESTION
Front
What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?
Back
Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr.
6.
FLASHCARD QUESTION
Front
What is an atom?
Back
The smallest unit of an element that retains the properties of that element.
7.
FLASHCARD QUESTION
Front
What did John Dalton propose about atoms?
Back
He proposed that all matter is made of atoms, which are indivisible and indestructible.
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