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Chemistry - Kautz > Mid Term Exam - 2017 > Flashcards

Mid Term Exam - 2017 Flashcards

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1
Q

Be able to look at a diagram and know which is a mixture?

A

Use your study guide

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2
Q

What is an identifying characteristic of a mixture?

A

A mixture can be separated by physical means

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3
Q

By what means do you separated iron filings and salt?

A

Solubility

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4
Q

What is a true solution?

A

Homogeneous

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5
Q

Be able to know what a filtration system looks like

A

Use your study guide

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6
Q

Be able to know what a distillation system looks like

A

Use your study guide

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7
Q

Is concentrated hydrochloric acid is diluted with water a chemical or physical change?

A

Physical change

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8
Q

What substance can decompose by a chemical change?

A

water

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9
Q

Is air an example of an element or mixture?

A

Mixture

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10
Q

Be able to look at a diagram and determine if it is mixture of compounds?

A

Use your notes

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11
Q

Be able to look at a diagram and determine if it is a mixture of elements.

A

Use your notes

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12
Q

What is the process that is used to separate a mixture of elements?

A

Distillation

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13
Q

Be able to look at a diagram and determine if it is an example of heterogeneous mixture of elements and compounds

A

Use your notes

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14
Q

How would you describe a chemical property of the element iodine?

A

It reacts with hydrogen to form a gas

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15
Q

Is burning a chemical or physical change?

A

Chemical Change

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16
Q

What happens to the product with the lower boiling point when distillation is performed?

A

It condenses in a receiving flask

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17
Q

Who is the greek philosopher that was the first person to propose the idea that matter is made of tiny individual particles called atoms?

A

Democritus

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18
Q

What is Dalton’s atomic theory?

A

Different atoms combine in simple whole number ratios to form compounds

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19
Q

What discovery was due to the development of the cathode ray tube?

A

electrons

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20
Q

What did experimental evidence indicate about the nucleus of an atom?

A

It contains most of the mass of the atom

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21
Q

What conclusion was made with regard to the experiment about alpha particles being used to bombard gold foil?

A

Nucleus of an atom is smaller that the atom and positively charged

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22
Q

What did scientist concluded about atoms after bombarding a gold foil sheet with alpha particles?

A

Atoms consist mainly of empty space

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23
Q

What is the location in an atom called that is a region of most probable electron?

A

An orbital

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24
Q

What particle has the least mass?

A

An electron

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25
Q

Describe an electron

A

A smaller mass than a proton and negatively charged

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26
Q

What particle has a mass of approximately one atomic mass unit and a unit positive charge?

A

proton

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27
Q

What particle has about the same mass as a proton?

A

neutron

28
Q

What two particles have most of the mass in the atom?

A

protons and neutrons

29
Q

What is the definition of the atomic mass of an element?

A

The weighted average mass of that element’s naturally occurring isotopes

30
Q

What principal energy level of an atom contains an electron with the lowest energy?

A

n = 1

31
Q

Be able to write the electron configuration of elements

A

Use your notes

32
Q

How many orbitals are in the s sublevel of an atom?

A

1

33
Q

How many orbitals are in the 4f sublevel?

A

7

34
Q

What sublevel contains the greatest number of orbitals?

A

f

35
Q

What principal energy level has no f sublevel?

A

3

36
Q

Be able to determine the number of COMPLETELY filled orbitals when you look at the electron configuration of an atom.

A

Use your notes

37
Q

What is the maximum number of electrons that a single orbital of the 3d sublevel can contain?

A

2

38
Q

What sublevel has a total of 5 orbitals?

A

d

39
Q

What is the total number of orbitals in a d sublevel?

A

5

40
Q

What MUST samples of elements that are radioactive contain?

A

Atoms with unstable nuclei

41
Q

Why is carbon-13 less stable than carbon-12??

A

Carbon -13 has more neutrons

42
Q

What particle has the greatest mass?

A

An alpha particle

43
Q

In an electric field - what emanation is deflected toward the negative electrode?

A

Alpha particle

44
Q

When an alpha particle is emitted by an atom the atomic number of the atom will . . . ?

A

Decrease by 2

45
Q

What does the structure of an alpha particle look like?

A

Helium nucleus

46
Q

What type of radiation is most similar to high-energy X-ray?

A

Gamma

47
Q

What emission from a radioactive source is not affected by an electric field?

A

Gamma rays

48
Q

Describe a gamma ray

A

No electric charge and no mass

49
Q

How are all the elements arranged on the modern Periodic table?

A

Atomic number

50
Q

Who was credited with creating the first periodic table that organized the elements according to atomic mass?

A

Dmitri Mendeleev

51
Q

Compare a neon atom to a helium atom?

A

Neon has a smaller radius

52
Q

Be able to determine which element has the largest atomic radius

A

Use your notes

53
Q

Be able to determine which elements are arranged in decreasing atomic radii

A

Use your notes

54
Q

Compare the atoms of metals to the atoms of nonmetals

A

Nonmetals have a higher electronegativities and lower ionization energies

55
Q

Be able to determine electronegativity of elements

A

Use your notes

56
Q

What type of bond is formed by the transfer of electrons from one atom to another?

A

And ion bond

57
Q

When ionic bonds are formed - what do metallic atoms tend to do?

A

Lose electrons and become positive ions

58
Q

When metal atoms bond with nonmetal atoms - - what will the nonmetal atoms do?

A

Gain electrons and the resulting ions are larger

59
Q

What type of bonds are formed when calcium atoms react with oxygen atoms?

A

Ionic bonds

60
Q

What will happen when a potassium atom reacts with bromine - what will happen with the potassium atom?

A

Will lose only 1 electron

61
Q

Be able to recognize an ionic compound

A

Use your notes

62
Q

Be able to recognize an ionic bond

A

Use your notes

63
Q

What type of bonding is characteristic of a substance that has a high melting point and electrical conductivity only in the liquid phase?

A

ionic bonding

64
Q

Which compound in the solid state has a high melting point and conducts electricity when it is liquefied?

A

potassium chloride

65
Q

What is the electronegativity value of an element?

A

A measure of the atoms ability to attract electrons

Chemistry - Kautz (16 decks)

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