Convert 79,000 inches to km (1 km = 0.621 mile and 1 mile = 5280 feet)
Semester 1 Exam Review part 2

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•
Chemistry
•
7th - 12th Grade
•
Hard
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16 questions
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1.
FLASHCARD QUESTION
Front
Back
2.01 km
2.
FLASHCARD QUESTION
Front
What Model of the atom is represented here?
Back
Bohr
3.
FLASHCARD QUESTION
Front
The gold foil experiment led to the conclusion that each atom in the foil was composed of mostly empty space because most alpha particles directed at the foil ____
Back
passed through the foil
4.
FLASHCARD QUESTION
Front
While J. J. Thomson was carrying out experiments on cathode rays, he determined that the rays consisted of particles he called 'corpuscles.' These particles were later named —
Back
electrons
5.
FLASHCARD QUESTION
Front
Who first proposed the concept of a small indivisible particle that makes up everything in the universe?
Back
Democritus
6.
FLASHCARD QUESTION
Front
What is the definition of an atom?
Back
The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.
7.
FLASHCARD QUESTION
Front
What is the significance of the gold foil experiment?
Back
It demonstrated that atoms have a small, dense nucleus and are mostly empty space.
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