Elements, Atoms And Bonding Rho Quiz

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1. Elements are called building blocks of matter because:
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2. Identify the scientist who contributed the basics of the atomic theory that is still accepted today. 
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3. In 430 b.c. ancient Greece, a philosopher named Democritus proposed the idea that matter is made up of very small pieces that are "uncuttable" into smaller parts and still be that element. It took 2000 years until Democritus' idea was accepted. These small "uncuttable" pieces are called:
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4. Identify the scientist who found that atoms contain negatively charged particles and reasoned that because atoms must be neutral, an atom needs to contain some positive charge. This scientist thought that the negatively charged particles would be scattered throughout a ball of positive charge. The negatively charged particles later became known as electrons. 
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5. This scientist discovered another particle in the nucleus of an atoms. The discovery completed the modern atomic model. This particle was hard to detect because it does not have an electrical charge even though it has nearly the same mass as a proton. Because the particle had no electrical charge it was called a neutron.
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6. What is the difference between a compound and a mixture?
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7. All the atoms of a single element have the same number of protons. Different elements have different number of _______________
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8. A compound is different from an element because a compound is: 
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9. Which of the following is not a mixture?
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10. Identify the scientist who revised earlier models to show that electrons could only have a specific amount of energy and move in certain orbits. The electron orbits resemble planet orbits or layers of an onion.
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11. What was important about Rutherford's gold foil experiment?
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12. Identify the scientist who theorized the atom to be made up of mostly empty space with electrons moving around a small positively charged nucleus in the center of the atom. This scientist named the positively charged particles in the nucleus protons.
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13. Identify which statement is NOT part of John Dalton's atomic theory:
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Elements are called building blocks of matter because:
Identify the scientist who contributed the basics of the atomic theory...
In 430 b.c. ancient Greece, a philosopher named Democritus proposed...
Identify the scientist who found that atoms contain negatively charged...
This scientist discovered another particle in the nucleus of an atoms....
What is the difference between a compound and a mixture?
All the atoms of a single element have the same number of protons....
A compound is different from an element because a compound is: 
Which of the following is not a mixture?
Identify the scientist who revised earlier models to show that...
What was important about Rutherford's gold foil experiment?
Identify the scientist who theorized the atom to be made up of mostly...
Identify which statement is NOT part of John Dalton's atomic...
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