1. During his distinguished career this scientist received two unshared Nobel prizes. One for chemistry and one for peace.
Alfred Nobel
Marie Currie
Linus Pauling
Albert Einstein
An Introduction To Chemistry
Answer Sheet
Please provide your answer in the answer sheets!
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An Introduction To Chemistry
1. During his distinguished career this scientist received two unshared Nobel prizes. One for chemistry and one for peace.
A. Alfred Nobel
B. Marie Currie
C. Linus Pauling
D. Albert Einstein
2. The study of matter and the changes it undergoes describes the science of .
A. physics
B. mathematics
C. chemistry
D. biology
3. The is the fundamental unit of matter.
A. atom
B. compound
C. nucleus
D. proton
4. The atom is composed of three subatomic particles known as , and .
A. neutrals, electives and peeons
B. quarks, alpha rays and xenons
C. electrons, protozoans and electricals
D. protons, neutrons and electrons
5. Protons are charged particles found in the nucleus of an atom.
A. neutrally
B. positively
C. negatively
D. brighltly
6. Electrons are charged particles that orbit the nucleus of an atom.
A. negatively
B. positively
C. neutrally
D. brighltly
7. Neutrons are particles found in the nucleus of an atom.
A. negatively charged
B. positively charged
C. uncharged
D. brightly
8. An ion is an atom or molecule that .
A. is electrically neutral
B. is composed of two or more elements
C. is man made
D. carries a charge
9. Which of the following chemical species is a cation?
A. Cl-
B. H+
C. Au
D. HCO3-
10. The atomic number of an atom or element describes the number of .
A. electrons orbiting the nucleus
B. neutrons in the nucleus
C. alpha particles in the nucleus
D. protons in the nucleus
11. Mass is proportional to the number of that make up an object.
A. atoms
B. cells
C. neutrons
D. protons
12. Weight is best described as .
A. the number of atoms in an object
B. the pull of gravity on matter
C. the electrical charge on an ion
D. the number of electons in an atom
13. Atoms of any one type of element, such as gold, all posess the same number of .
A. electrons
B. neutrons
C. protons
D. nuclei
14. There are currently known elements.
A.65
B.98
C.112
D.152
15. Element are one or two letter abbreviations for the names of the elements.
A. numbers
B. atomic numbers
C. symbols
D. characters mass
16. Two or more elements that combine as a result of a chemical reaction form .
A. atoms
B. ions
C. mixtures
D. compounds
17. An example of a mixture would be .
A. a bar of pure gold
B. the air we breathe
C. sodium chloride salt
D. pure water
18. The three states of matter are , and .
A. atoms, molecules and compounds
B. atoms, compounds and mixtures
C. solids, liquids and gases
D. solids, gases and steam
19. The least dense and most energetic of the three states of matter is .
A. the gaseous state
B. the liquid state
C. the solid state
D. the elemental state
20. All measurements must consist of both .
A. a size and a shape
B. a price and a volume
C. a number and a unit
D. a color and a number
21. Density is a physical property that refers to .
A. the number of atoms in an object
B. the weight of an object
C. the mass of an object relative to its volume
D. the weight of an object relative to its cost
22. A kilogram is equal to grams.
A.1
B.10
C.100
D.1,000
23. There are centimeters in a meter.
A.1
B.10
C.100
D.1,000
24. Measurements are because of equipment error and human judgment.
A. useless
B. uncertain
C. perfect
D. inaccurate
25. The number 221.5 contains significant figure(s).
A.1
B.2
C.3
D.4
26. The number .001 contains significant figure(s).
A.1
B.2
C.3
D.4
27. The number 226 would be scientifically noted as .
A.226
B.2.26 x101
C.2.26 x 102
D.22.6 x 101
28. The figure .005 would be scientifically noted as .
A.5 x 10-1
B.5 x 10-2
C.5 x 10-3
D.5 x 10-4
29. Elements or atoms are arranged on the periodic table in the order of increasing .
A. atomic mass
B. atomic weight
C. atomic number
D. atomic symbols
30. A substance that weighs 10 grams and has a volume of 2 cm3 would have a density of .
A.5 g/cm3
B.10g/cm3
C.2g/cm3
D.15g/cm3
31. The terms Kelvin, Celsius and Fahrenheit all correspond to units of .
A. density
B. hardness
C. volume
D. temperature
32. The is the SI standard unit for measurements of length.
A. cetimeter
B. foot
C. meter
D. yard
33. One kilogram is equal to approximately pounds.
A.1.2
B.2.2
C.3.2
D.4.2
Answers: 2
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Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)
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