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Chemistry > Quiz 3 > Flashcards

Quiz 3 Flashcards

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1
Q

Protons are _____ charges

A

Positively

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2
Q

Important physical properties of nonmetals

A

Dull, brittle, lower densities

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3
Q

What is the top number in nuclear notation?

A

Atomic weight

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4
Q

The periodic table has historically been arranged by ____

A

Mass

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5
Q

Number of _____ defines an element

A

Protons

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6
Q

When did John dalton develop the basis for modern atomic theory?

A

1803

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7
Q

Important physical properties of metals

A

Shiny, malleable, high densities

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8
Q

Do metals conduct electricity?

A

Yes

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9
Q

When talking about an isotope specifically the mass is referred to as the ____ ________

A

Mass number

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10
Q

Electrons = _________

A

Protons

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11
Q

Niels Bohr theorized about atoms in what year?

A

1913

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12
Q

What subatomic particle changes mass?

A

Neutrons

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13
Q

What phases are halogens in?

A

Varying

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14
Q

What do the periods represent?

A

Gives info on electron position

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15
Q

Then mass in a center of an atom is called a ______

A

Nucleus

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16
Q

What are halogens reactive with?

A

Everything

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17
Q

Electrons are ______ charged

A

Negatively

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18
Q

Democritus thought that atoms are ________ into smaller parts. Is this true or false?

A

Indivisible, false

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19
Q

What is the bottom number on nuclear notation?

A

Atomic number

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20
Q

The periodic table is arranged by

A

Properties repeated in columns

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21
Q

Period on the periodic table?

A

Row

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22
Q

Important physical properties of metalloids?

A

Solids, that are dull or shiny, brittle, or malleable with varying densities

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23
Q

The nucleus contains what percent of atomic mass

A

90%

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24
Q

What is mass number?

A

Number of neutrons and protons in an isotope if an atom

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25
Q

Phases of metalloids?

A

Varying phases of matter

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26
Q

What do transition metals form?

A

Colored compounds

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27
Q

The further from the nucleus the ___ energy

A

More

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28
Q

What is atomic weight?

A

Ave sum of neutrons and protons in nucleus

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29
Q

What do groups consist of in the periodic table?

A

Similar reacting elements

30
Q

Why is it difficult to determine where the electrons exact location is?

A

They are very small and mobile

31
Q

Where are metals on the periodic table?

A

Left, center, bottom right

32
Q

Atomics size _______ across period

A

Decreases

33
Q

Max # of electrons per shell

A

2n^2

34
Q

atoms do not have a definite _____

A

Size

35
Q

Outermost electrons are called what?

A

Valance electrons

36
Q

Neutrons only alter _____ not __

A

Mass, id

37
Q

Where are metalloids on the periodic table?

A

Between metals and nonmetals

38
Q

Phases of metals?

A

All solid except for Hg

39
Q

Democritus thought that atoms were different because their _____ and _____ is different. Is this true or false?

A

Size, shape. True.

40
Q

Elements in the same group have _____ number of valance electrons but have different ________ __ ____

A

Same, number of shells

41
Q

How can shells be abbreviated?

A

(N)

42
Q

Democritus though that atoms are infinite in ______ and ______. Is this true or false?

A

Type, number. False.

43
Q

When talking about an element generically it’s mass is referred to as the ________

A

Atomic weight

44
Q

Atomic size _______ down a group

A

Increases

45
Q

Electrons are found at specific distances from the nucleus called ______

A

Shells

46
Q

What main group of element glows when electrocuted?

A

Noble gases

47
Q

Neutrons are ______ charged

A

Neutrally

48
Q

Do metalloids conduct electricity?

A

Sometimes

49
Q

What is the number at the bottom of the periodic table?

A

Atomic weight

50
Q

What are noble gases reactive with?

A

Everything

51
Q

Atoms are all ________ charged

A

Neutrally

52
Q

What color are noble gases?

A

Colorless

53
Q

What ratio do protons and electrons exist within an atom?

A

They are equal

54
Q

What makes the atomic weight an average?

A

Individual atoms exist with different masses

55
Q

What part of the atom has the most mass?

A

The nucleus

56
Q

Do nonmetals conduct electricity?

A

No, they insulate

57
Q

How are electrons oriented on a molecule?

A

Some electrons are closer to the nucleus than others

58
Q

What is the first number on a periodic table?

A

Atomic number

59
Q

Alkaline earth metals are ____ than alkali metals and ___ réactive in h2o

A

Harder, less

60
Q

Shells are not ____

A

Orbits

61
Q

What is the atomic number?

A

Number of protons in an atom

62
Q

What state is a transition metal in at room temp?

A

Solid

63
Q

What provides the amount of shells?

A

Period number

64
Q

What is a group on the periodic table?

A

Columns

65
Q

The nucleus has a ______ charge

A

Positive

66
Q

Elements in the same period have _______ valance electrons

A

Different

67
Q

Electrons are _____ and ______

A

Smaller, mobile

68
Q

Where are the nonmetals on the periodic table?

A

Right side and hydrogen

69
Q

Atoms are different _____ with slightly different _______

A

Sizes, composition

70
Q

Phases of metalloids?

A

Solids

71
Q

What is the law of conservation of mass?

A

Matter is neither created nor destroyed

Chemistry (9 decks)

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