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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12 29

13 30

14 31

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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

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