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Periodic Table Unit Review
Periodic Table Unit Review
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1
Which of the following is a substance that cannot be broken down into simpler substances by chemical means?
element
compound
mixture
2
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
5p
6
6s
2
5d
1
4f
14
5d
9
How many electrons in the 7th energy level?
32
0
2
3
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
5p
6
6s
2
5d
1
4f
14
5d
9
How many electrons in the 1st energy level?
2
8
18
4
To determine the mass of an element, what do you do with its isotopes?
Add them all.
Find the median value.
Take a weighted average.
5
In which segment of Figure 5-1 will the properties of elements be the most similar?
segment B
segment A
neither segment A or B
6
Which element is found in most of the compounds in your body except for water?
carbon
iron
potassium
7
What does the nucleus of an atom contain?
protons and neutrons
protons and electrons
neutrons and electrons
8
The atomic mass of an element is
a weighted average of the masses of an element's isotopes.
the sum of the protons and neutrons in one atom of the element.
twice the number of protons in one atom of the element.
9
What is group 1 called on the periodic table?
alkaline earth metals
halogens
alkali metals
10
The unit for atomic mass is
pound
amu
gram
11
What are groups 3-12 called on the periodic table?
Noble Gases
Carbon family
Transition metals
12
What is electron configuration?
The speed of electrons in an atom after comparing to its isotopes
The number of valence electrons of an atom
The arrangement of electrons in the energy levels of an atom
13
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
5p
6
6s
2
5d
1
4f
14
5d
9
How many electrons in the 3rd energy level?
18
8
2
14
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
5p
6
6s
2
5d
1
4f
14
5d
9
How many electrons in the 4th energy level?
2
18
32
15
The tendency of an element to react is closly related to
the number of valence electrons in atoms of the element.
the ratio of protons to neutrons in atoms of the element.
attractions between its atoms.
16
The standard on which the atomic mass unit is based is the mass of a
carbon-12 atom
proton
neutron
17
What is group 17 called on the periodic table?
alkali metals
alkaline earth metals
halogens
18
In a periodic table, a set of properties repeats from
row to row.
element to element.
group to group.
19
What is group 18 called on the periodic table?
Noble Gases
Transition metals
Carbon family
20
At room temperature, none of the metals are
gases.
soft.
liquids.
21
What is the name of the table that arranges chemical elements in order of atomic number with repeating properties?
force table
periodic table
table of compounds
22
Which of the following gases emit colors when an electric current is applied?
Ar and Kr
F and Cl
H and He
23
If you want to know which atom an element is, then count the _____
protons
electrons
neutrons
24
What is the smallest unit of a chemical element?
compound
molecule
atom
25
Which of the following Group 1A elements is the most reactive?
Na
Cs
K
26
Group 7A of the periodic table contains the
most reactive nonmetals.
most reactive metals.
least reactive metals.
27
Which of the following Group 7A elements is the most reactive?
Br
Cl
F
28
What element is missing from the square that is empty?
H
Au
F
29
To help find the weighted average of an element's mass, shown in the image, what calculation would you do?
17 x 2.2
15 x 56.23
16 x 0.2177
30
What determines and element's chemical properties?
electron configuration
mass number
atomic number
31
The two most reactive groups on the periodic table are the alkali metals and the what?
noble gases
alkaline earth metals
halogens
32
What increases by exactly 1 from element to element across a period from left to right?
atomic mass unit
mass number
atomic number
33
Why is hydrogen in Group 1A with metals, even though it is a nonmetal?
It has 1 valence electron.
It is the first element.
It is really a metal.
34
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
5p
6
6s
2
5d
1
4f
14
5d
9
How many electrons in the 6th energy level?
18
32
2
35
What element is most reactive in Figure 5-3?
Rb
Zr
Li
36
Explain why isotopes of the same element have different mass numbers.
They have the same number of protons but different number of neutrons.
They have the same number of neutrons but different number of electrons.
They have the same number of protons but different number of electrons.
37
What is a one or two-letter abbreviation for a chemical element called?
atomic notation
atomic name
chemical symbol
38
What is group 2 called on the periodic table?
alkaline earth metals
halogens
alkali metals
39
What do the whole numbers on each element in the periodic table mean?
atomic number
mass number
number of neutrons
40
Mendeleev arranged the known chemical elements in a table according to increasing
number of electrons
mass
number of protons
41
The usefulness of Mendeleev's periodic table was confirmed by
its immediate acceptance by other scientists.
the discovery of the nucleus.
the discovery of elements with predicted properties.
42
What is a period on the periodic table?
family
row
column
43
Mendeleev's periodic table was useful because it enabled scientists to predict properties of unknown what?
ions
molecules
elements
44
What does the atomic number of an element represent?
number of neutrons
number of protons
number of electrons
45
Which of the following determines the element's place on the periodic table?
atomic number
number of electrons
atomic mass
46
When Mendeleev organized elements in his periodic table, elements with similar properties were in the same what?
row
period
column
47
Elements are classified as metals, nonmetals or what?
conductors
metalloids
gases
48
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
5p
6
6s
2
5d
1
4f
14
5d
9
How many electrons in the 5th energy level?
18
32
2
49
Which list of elements contains only metals?
iodine, carbon, argon
tin, copper, cesium
carbon, iodine, tin
50
One way to demonstrate the reactivity of alkali or alkaline earth metals is putting them in what?
oil
water
a noble gas
51
Figure 5-1 shows a portion of a blank periodic table. Identify the segments labeled A and B.
A is a group and B is a period.
A and B are both groups.
A is a period and B is a group.
52
Which element in Figure 5-2 is a transition metal?
Be
V
N
53
1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
6
5s
2
4d
10
5p
6
6s
2
5d
1
4f
14
5d
9
How many electrons in the 2nd energy level?
2
8
18
54
Which element in Figure 5-2 is a Noble Gas?
V
Na
He
55
In which segment of Figure 5-1 will the properties of elements vary the most?
neither segment A or B
segment B
segment A
