Embedded Files
Isotope
Neutrons
Protons
At. Mass
At. #
Iodine-125
53
48
110
48
Fluorine-
18
9
Calcium-
21
20
1
2
Isotope is the name followed by atomic mass.
Protons=Atomic number
Atomic mass=Protons + Nuetrons
Charges = Protons - Electrons
Calculate the proper number of neutrons for:
*Remember it is the atomic mass-atomic number. Nuetrons=Mass-Atomic number
A) Nitrogen-13 F) Boron-10
B) Barium-130 G) Arsenic-68
C) Zirconium-90 H) Palladium-108
D) Helium-2 I) Argon-35
E) Gallium-68 J) Neon-22
ANSWERS BELOW
Isotope
n
Protons
At. Mass
At. #
Iodine-125
72
53
125
53
Cadmium-110
62
48
110
48
Fluorine-18
9
9
18
9
Calcium-41
21
20
41
20
Helium-3
1
2
3
2
Calculate the proper number of neutrons for:
Remember it is the atomic mass-atomic number.
A) Nitrogen-13-7= 6 n F) Boron-10-5= 5 n
B) Barium-130-56=74 n G) Arsenic-68-33=35 n
C) Zirconium-90-40= 50 n H) Palladium-108-46= 62 n
D) Helium-2-2= 0 n I) Argon-35-18= 17 n
E) Gallium-68 -31=37 n J) Neon-22 -10 =12 n
DAY 2
Isotope
n
Protons
At. Mass
At. #
Symbol
72
45
42
100
Neon-18
Potassium-
21
2
2
Calculate the proper number of neutrons for:
A) Nickel-58 F) Cadmium-100
B) Boron-12 G) Argon-38
C) Chromium-54 H) Lithium-6
D) Aluminum-27 I) Lead-208
E) Oxygen-17 J) Strontium-88
ANSWERS BELOW
Isotope
n
Protons
At. Mass
At. #
Symbol
Rhodium-117
72
45
117
45
11745Rh
Molybdenium- 100
58
42
100
42
10042Mo
Neon-18
8
10
18
10
1810Ne
Potassium-40
21
19
40
19
4019K
Helium-4
2
2
4
2
42He
Calculate the proper number of neutrons for:
A) Nickel-58-28=30n F) Cadmium-100-48=52n
B) Boron-12-5=7 n G) Argon-38-18=20n
C) Chromium-54-24=30n H) Lithium-6-3=3n
D) Aluminum-27-13 = 14n I) Lead-208-82=126n
E) Oxygen-17-8= 9 n J) Strontium-88-38=50n
DAY 3
Isotope
n
Protons
At. Mass
At. #
Symbol
32
30
38
80
Nitrogen-15
Aluminum-
15
6
5
Calculate the neutrons for:
Helium-5 Carbon-14 Argon-42 Copper-65
Draw the electron dot diagram for:
Potassium Oxygen Nitrogen Neon
ANSWERS BELOW
Isotope
n
Protons
At. Mass
At. #
Symbol
Zinc-62
32
30
62
30
6230Zn
Strontium-80
42
38
80
38
8038Sr
Nitrogen-15
8
7
15
7
157N
Aluminum-28
15
13
28
13
2813Al
Boron-11
6
5
11
5
115B
Calculate the neutrons for:
Helium-5 Carbon-14 Argon-42 Copper-65
5-2=3 n 14-6=8 n 42-18=24 n 65-29= 36 n
Draw the electron dot diagram for:
Potassium Oxygen Nitrogen Neon
.. . ..
.K :O: :N: :Ne:
..
DAY 4
Isotope
n
Protons
Symbol
At #
At.Mass
8035Br
5
4
Neon-22
Phosphorous-
15
7
14
List the number of Neutrons for:
Copper-60 Silver-107 Zirconium-90
Draw the electron dot diagram for:
Cesium Boron Chlorine Krypton
ANSWERS BELOW
Isotope
n
Protons
Symbol
At #
At.Mass
Bromine-80
45
35
8035Br
35
80
Beryllium-9
5
4
94Be
4
9
Neon-22
12
10
2210Ne
10
22
Phosphorous-30
15
15
3015P
15
30
Nitrogen-14
7
7
147N
7
14
List the number of Neutrons for:
Copper-60 Silver-107 Zirconium-90
60-29=31 n 107-47=60 n 90-40= 50 n
Draw the electron dot diagram for:
Cesium Boron Chlorine Krypton
. .. ..
.Cs :B :Cl: :Kr:
. . .
DAY 5
Isotope
n
Protons
At. Mass
At. #
Symbol
Bromine-81
46
81
21
17
Titanium-50
28
50
13
28
10
6
List the number of Neutrons for:
Manganese-55 Krypton-86 Astatine-210
Draw the electron dot diagram for:
Calcium Aluminum Polonium Xenon
Isotope
n
Protons
At. Mass
At. #
Symbol
Bromine-81
46
35
81
35
8135Br
Chlorine-38
21
17
38
17
3817Cl
Titanium-50
28
22
50
22
5022Ti
Aluminum-28
15
13
28
13
2813Al
Carbon-16
10
6
16
6
166C
List the number of Neutrons for:
Manganese-55 Krypton-86 Astatine-210
55-25=30 n 86-36=50 n 210-85= 125 n
Draw the electron dot diagram for:
Calcium Aluminum Polonium Xenon
. . ..
:Ca :Al :Po: :Xe:
. . .
DAY 6
Isotope
n
Protons
At. Mass
At #
Symbol
Silicon-30
12050Sn
27
23
15
29
Polonium-
209
List the number of Neutrons for:
Yttrium-90 Rhenium-187 Platinum-90
Draw the electron dot diagram for:
Francium Silicon Iodine Fluorine
Isotope
n
Protons
At. Mass
At #
Symbol
Silicon-30
16
14
30
14
3014Si
Tin-120
70
50
120
50
12050Sn
Vanadium-50
27
23
50
23
5023V
Phosphorous-29
14
15
29
15
2915P
Polonium-209
125
84
209
84
20984Po
List the number of Neutrons for:
Yttrium-90 Re-187 Platinum-90
90-39=51 n 187-75=112 n 90-78= 12 n
Draw the electron dot diagram for:
Francium Silicon Iodine Fluorine
.. .. ..
.Fr :Si :I : :F:
. .
DAY 7
Isotope
n
Protons
At. Mass
At #
Symbol
Sulfur-36
7433As
45
35
7
14
Lead-
209
List the number of Neutrons for:
Lutetium-171 Radon-222 Zirconium-90
Draw the electron dot diagram for:
Indium Radon Sulfur Argon
Isotope
n
Protons
At. Mass
At #
Symbol
Sulfur-36
20
16
36
16
3616S
Arsenic-74
41
33
74
33
7433As
Bromine-80
45
35
80
35
8035Br
Nitrogen-14
7
7
14
7
147N
Lead-209
127
82
209
82
20982Pb
List the number of Neutrons for:
Lutetium-171 Radon-222 Zirconium-90
171-71=100 n 222-86=136 n 90-40= 50 n
Draw the electron dot diagram for:
Indium Radon Sulfur Argon
.. .. ..
: In. :Rn: :S : :Ar:
. . . .
DAY 8
Isotope
n
Protons
At. Mass
At #
Symbol
Sulfur-30
11454Xe
45
40
38
88
Ruthenium-102
List the number of Neutrons for:
Hafnium-171 Bismuth-210 Astatine-210
Draw the electron dot diagram for:
Radium Lawrencium Selenium Krypton
Isotope
n
Protons
At. Mass
At #
Symbol
Sulfur-30
14
16
30
16
3016S
Xenon-114
60
54
114
54
11454Xe
Zirconium-85
45
40
85
40
8540Zr
Strontium-88
50
38
88
38
8838Sr
Ruthenium-102
58
44
102
44
10244Ru
List the number of Neutrons for:
Halfnium-171 Bismuth-210 Astatine-210
171-72=99 n 210-83=127 n 210-85= 125 n
Draw the electron dot diagram for:
Radium Lawrencium Selenium Krypton
.. ..
: Ra :Lr :Se : :Kr:
. .
Page updated
Report abuse