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Chemistry > Quiz 3 > Flashcards

Quiz 3 Flashcards

(71 cards)

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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
Phases of metalloids?
Varying phases of matter
26
What do transition metals form?
Colored compounds
27
The further from the nucleus the ___ energy
More
28
What is atomic weight?
Ave sum of neutrons and protons in nucleus
29
What do groups consist of in the periodic table?
Similar reacting elements
30
Why is it difficult to determine where the electrons exact location is?
They are very small and mobile
31
Where are metals on the periodic table?
Left, center, bottom right
32
Atomics size _______ across period
Decreases
33
Max # of electrons per shell
2n^2
34
atoms do not have a definite _____
Size
35
Outermost electrons are called what?
Valance electrons
36
Neutrons only alter _____ not __
Mass, id
37
Where are metalloids on the periodic table?
Between metals and nonmetals
38
Phases of metals?
All solid except for Hg
39
Democritus thought that atoms were different because their _____ and _____ is different. Is this true or false?
Size, shape. True.
40
Elements in the same group have _____ number of valance electrons but have different ________ __ ____
Same, number of shells
41
How can shells be abbreviated?
(N)
42
Democritus though that atoms are infinite in ______ and ______. Is this true or false?
Type, number. False.
43
When talking about an element generically it’s mass is referred to as the ________
Atomic weight
44
Atomic size _______ down a group
Increases
45
Electrons are found at specific distances from the nucleus called ______
Shells
46
What main group of element glows when electrocuted?
Noble gases
47
Neutrons are ______ charged
Neutrally
48
Do metalloids conduct electricity?
Sometimes
49
What is the number at the bottom of the periodic table?
Atomic weight
50
What are noble gases reactive with?
Everything
51
Atoms are all ________ charged
Neutrally
52
What color are noble gases?
Colorless
53
What ratio do protons and electrons exist within an atom?
They are equal
54
What makes the atomic weight an average?
Individual atoms exist with different masses
55
What part of the atom has the most mass?
The nucleus
56
Do nonmetals conduct electricity?
No, they insulate
57
How are electrons oriented on a molecule?
Some electrons are closer to the nucleus than others
58
What is the first number on a periodic table?
Atomic number
59
Alkaline earth metals are ____ than alkali metals and ___ réactive in h2o
Harder, less
60
Shells are not ____
Orbits
61
What is the atomic number?
Number of protons in an atom
62
What state is a transition metal in at room temp?
Solid
63
What provides the amount of shells?
Period number
64
What is a group on the periodic table?
Columns
65
The nucleus has a ______ charge
Positive
66
Elements in the same period have _______ valance electrons
Different
67
Electrons are _____ and ______
Smaller, mobile
68
Where are the nonmetals on the periodic table?
Right side and hydrogen
69
Atoms are different _____ with slightly different _______
Sizes, composition
70
Phases of metalloids?
Solids
71
What is the law of conservation of mass?
Matter is neither created nor destroyed

Chemistry (9 decks)

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