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Unit 3: Atoms and The Periodic Table Flashcards | StudBud
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Unit 3: Atoms and The Periodic Table
Unit 3: Atoms and The Periodic Table
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Answers
1
Which of the groups on the periodic table contain colorless, odorless gases?
carbon group
halogens
oxygen group
noble gases
2
As you go from left to right on the periodic table, the number of valence electrons _______
increases
decreases
stays the same
3
Rows in the periodic table are called ______
groups
periods
sections
columns
4
Oxygen-18 is a(n) _______.
compound
ion
molecule
isotope
5
Helium is a _______
nonmetal
metalloid
metal
6
Oxygen is a _______ at room temperature
liquid
solid
plasma
gas
7
Which of the groups on the periodic table have the softest metals?
4
3
1
2
8
What is the oxidation number for Neon?
-1
8
0
+1
9
Chlorine is a ________
metalloid
nonmetal
metal
10
What is the oxidation number of Phosphorus?
+5
-5
+3
-3
11
An ion with a negative charge is called a(n)
cation
anion
ion
compound
12
The oxidation number of an element tells you how many __________ an element gains or loses.
electrons
neutrons
ions
protons
13
How many electrons does S
-2
have?
18
14
32
16
14
How many valence electrons does Argon (Ar) have?
6
7
5
8
15
What is the oxidation number for Lithium?
-1
+2
-2
+1
16
How many neutrons does Carbon-16 have?
10
6
7
12
17
What is the oxidation number for Boron?
+3
0
-3
+6
18
Aluminum is a _______
nonmetal
metal
metalloid
19
What group contains the halogens?
8
5
6
7
20
How many valence electrons does Oxygen have?
3
4
6
5
21
Most of the elements on the Periodic Table are _______ at room temperature
gas
plasms
solid
liquid
22
Hydrogen is a ________
metalloid
nonmetal
metal
23
How many valence electrons does Calcium have?
1
4
3
2
24
Most of the nonmetals are _______ at room temperature
liquid
gas
solid
plasma
25
If an atom has 36 protons, 44 neutrons, and 35 electrons, what is its mass number?
79
71
115
80
26
What group are noble gases located?
6
7
8
5
27
If an atom has a mass number of 120 and an atomic number of 100, how many neutrons are there?
50
100
20
240
28
Silicon is a ________
nonmetal
metal
metalloid
29
Electrons have a negative charge.
False
True
30
What is Carbon-16's atomic mass?
12
6
16
10
31
Potassium is a _______ at room temperature
gas
solid
plasma
liquid
32
What tells you how many valence electrons an element has?
group number
atomic mass
number of protons
period number
33
Calcium is a ________
metal
metalloid
nonmetal
34
Where are the transition metals located?
on the staircase
to the right of the staircase
in the middle of the periodic table
on the left of the staircase
35
Protons and electrons are found in the nucleus of an atom
True
False
36
What determines an elements identity?
net charge
number of electrons
Number of neutrons
number of protons
37
The only two elements that are liquid at room temperature are
sulfur and lithium
fluorine and iodine
neon and chlorine
mercury and bromine
38
How many electrons does Na
+1
have?
10
12
11
23
