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Sci 8 Periodic Table Flashcards | StudBud
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Sci 8 Periodic Table
Sci 8 Periodic Table
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Made for 8th grade P. Science studying basics of chemistry and the periodic table
Flashcards
56 cards
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Questions
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Answers
1
The first letter in a chemical symbol is ...
always Upper case
lower case
sometimes Capital
doesn't matter
2
Because atoms are electrically neutral the number of __ must equal the number of __
neutrons, protons
protons, quarks
eletrons, neutrons
protons, electrons
3
Protons, neutrons, and electrons are all examples of
subatomic particles
elements
nothing
quarks
4
Name the family beneath the arrow
Alkali metals
Oxygen
Halogens
Noble gases
5
The yellow elements represent the ___ class
nonmetals
metalloids
metals
6
Most elements of the periodic table are
gases
nonmetals
metals
metalloids
7
The vertical column of elements is called a(n)
family
atomic line
period
series
8
The most abundant element in the universe is
helium
nitrogen
carbon
hydrogen
9
The modern periodic table was first created by
Mendeleev
Moseley
Rutherford
Democritus
10
There are __ forces that hold an atom together.
2
3
1
4
11
Which of the following is true about elements?
all elements exist in approximately equal number
all elements are found in their uncombined form in nature
each element has a unique Atomic number (#p+)
every element occurs naturally
12
Mendeleev found that elements' properties followed a pattern that repeated every
7 elements
never
17 elements
18 elements
13
This group is named for the only gas in the group and the element makes up 78-80% of the air
carbon
nitrogen
boron
oxygen
14
Name the family beneath the arrow
Boron
Carbon
Oxygen
Halogen
15
The atomic number of an atom is the number of __ in the nucleus of the atom
quarks
neutrons
protons
electrons
16
This group is named for the gas essential for cellular respiration ( and breathing)
nitrogen
carbon
boron
oxygen
17
This group has 1 metaloid and the rest metals, one of which is recyclable
boron
oxygen
carbon
nitrogen
18
This group has 4 valence electrons and one of its elements is used in computer chips
Oxygen
Carbon
Boron
Nitrogen
19
soft , silvery, VERY reactive metals
alkali metals
metalloids
alkaline earth metals
nonmetal
20
The two rows at the bottom of the table are called the
rare earth group
noble gases
rare earth series
alkaline earth metals
21
Name the family beneath the arrow
Transition metals
Alkaline earth metals
Alkali metals
Halogens
22
Colorless, odorless, nonmetal with 8 electrons in the outer shell
lanthanides
Oxygen family
Noble gases
halogens
23
Most metals are good conductors of
thermal energy (heat)
both A & B
electric current
light energy
24
___ improved the original arrangement of the periodic table rearranging it by_ rather than mass
Moseley, atomic number
Mosley, Atomic mass
Mendeleev, Atomic number
Democritus, mass
25
Air is composed mainly of elements that are
noble gasses
metals
metalloids
nonmetals
26
Left to right across a row on the p. table the __ increases b/c adding p+, e-, and n
atomic value
energy
atomic mass
reactivity
27
___ is equal to the ____ which gives the atom its identity
electrons, Atomic number
protons, Atomic mass
neutrons, Atomic number
protons, Atomic number
28
If a group/family number is written as a Roman numeral and is followed by an A you know
the class of the element
total # e-
# of e- shells
# of valence e-
29
This huge family has elements that have either 1 or 2 valence electrons, many used in jewelry
alkaline earth metals
alkali metal
transiition metals
rare earth metals
30
You can see your reflection in a mirror because, silver has the metallic property of being
malleable
ductile
lustrous (shiny)
conductive
31
Elements that border the zigzag line on the periodic table are
metalloids
nonmetals
metals
32
The blue on the periodic table represents the ___
nonmetals
metalloids
metals
33
Elements the same family or group on the periodic table often share similar properties because
they are found in the same place on Earth
their atoms have same # e- in outer energy level
they look alike
they have the same physical state
34
Name the family beneath the arrow
Alkaline earth metals
Noble gases
Alkali metals
Halogens
35
Mendeleev arrange the periodic table by atomic mass because
they are whole numbers
he based it on chemical reactions
subatomic particles were not yet discovered
he liked them
36
Name the family beneath the arrow
nobel gases
alkali metals
transition metals
alkaline earth metals
37
Name the family beneath the arrow
Boron
Nitrogen
Carbon
Oxygen
38
The elements in a period the periodic table become
less metallic moving left to right
more metallic moving from top to bottom
less metallic moving top to bottom
more metallic moving from left to right
39
The zigzag line on the periodic table helps us to identify
which elements are metals, nonmetals, or metalloids
the physical state of an element at room temperature
the group number of an element
location of lanthanides and actinides
40
The transition metals in groups 3-12
have the same physical and chemical properties
have unstable atoms
are poor conductors of electricity
are all solid metals at room temperature except mercury
41
Name the family beneath the arrow
Nitrogen
Boron
Oxygen
Carbon
42
Semimetals is another term for the class of elements called
nonmetals
Nobel gases
metals
metalloids
43
The horizontal row of elements is called a(n)
group
family
atomic line
period
44
Rare earth series elements are part of the __ group
Alkali metals
Transition metals
Halogens
Alkaline earth metals
45
The ancient elements are all ...
have been discovered only recently
are all metals
were named by Mendeleev
are all gasses
46
Name the family beneath the arrow
oxygen
nitrogen
carbon
boron
47
Isotopes are atoms of the same element with the same atomic number but different numbers of __
neutrons
protons
electrons
48
What family is beneath the arrow?
metalloids
Alkaline earth metals
Halogens
Alkali metals
49
This class of elements found on the right side of the periodic table
metals
nonmetals
Noble gases
metalloids
50
What family is represented on the far right (see arrow)
alkaline earth metals
halogens
Noble gases
Carbon family
51
The atomic mass number =
# of electrons (e-)
# of neutrons
# protons & neutrons
# of protons
52
Name the family beneath the arrow
noble gases
halogens
alkali metals
alkaline earth metals
53
when these nonmetals react with a metal a salt is formed
Oxygen
Alklali
Noble gases
Halogens
54
The green represents the ___ class
metalloids
nonmetals
metals
55
The wires in your home's electrical devices demonstrate a metal's property of being
reflective
malleable
lustrous (shiny)
conductive
56
The number of the period or row that the element is in tells us the number of
electons
protons
electron shells
neutrons
