Quiz
Honors Chemistry Quiz
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Perguntas do quiz (20)
1Which of the following is a physical property of paper?
- AIt does not rust when exposed to oxygen.
- BIt is flammable.
- CIt can be easily ripped into smaller pieces.
2Chemical properties can always be determined by simply touching or looking at a substance.
- AVerdadeiro
- BFalso
3Boiling water is a chemical change.
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4Drying a wet dish with a towel is a physical change.
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5Which of the following are examples of physical changes?
- AA banana is sliced and put in a fruit salad.
- BAn ice cube sits in the hot sun and melts into a puddle, then evaporates.
- CA slice of bread is left in the toaster too long and burns to a crisp.
- DA milk carton is left out of the refrigerator and turns sour.
6You are examining a certain substance as part of an experiment. The substance's atoms are moving randomly and rapidly, and take the shape of the container they are placed in. When you open the container, the substance diffuses quickly into the air. Given this information, you conclude that the substance is a:
- ASolid
- BLiquid
- CGas
7Which of the following are NOT properties of a solid?
- ATightly packed atoms
- BAtoms diffuse quickly
- CCan be compressed
- DDefinite shape and volume
8Dry ice is the solid form of carbon dioxide, which lacks a liquid state. By which process is dry ice created?
- Adeposition
- Bfreezing
- Ccondensation
- Dsublimation
9Which two changes of state result in a liquid?
- AFreezing
- BSublimation
- CMelting
- DCondensation
10When enough heat is added to most solids, they will either melt or sublimate.
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11Electrons have a positive charge.
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12"Average atomic mass" is the number of protons plus electrons in an atom.
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13Which of the following terms refers to the number of protons and neutrons in an atom's nucleus?
- AMass number
- BAtomic number
- CAverage atomic mass
- DNuclear total
14A given atom has no charge. It has an atomic number of 5. How many electrons does it have?
- A10
- B8
- C5
- D2
15If an atom has an atomic mass number of 10, and you know it has 7 neutrons, the atomic number must be 3.
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16Which parts of an atom orbit around the nucleus?
- AProtons
- BElectrons
- CNeutrons
- DProtons and electrons
17Electrons are negative, protons are positive, and neutrons have no charge.
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18A particular atom has two isotopes.
The mass of the first isotope, in amu, is 20.802, and its percent abundance is 42.5.
The mass of the second isotope, in amu, is 35.599, and its percentage abundance is 57.5.
What is the atom's average atomic mass?- A29.310 amu
- B29 grams
- C13.783 amu
- D146.55 amu
19Oxygen has three naturally occurring isotopes:
Mass of 15.995, natural abundance of 99.76%
Mass of 16.999, natural abundance of 0.038%
Mass of 17.999, natural abundance of 0.205%
What is the average atomic mass?- A16.000 amu
- B15.9 grams
- C33.334 amu
- D15.8 amu
20Atomic mass is measured in amu, a unit derived from the mass of carbon-12.
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Informações
- Descrição
- A quiz I designed as a part of my Honors project.
- Autor
- Alexis B.
- Idioma
- English
- Visualizações
- 52
- Etiquetas
- Avaliação
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