Atomic Structure
1) Atomic Structure – Complete the following table
Element Name
Atomic
Number
Mass
Number
Number of
Protons
Number of
Electrons
Number of
Neutrons
Standard Atomic
Notation
70
48
80
2) Isotope and Radioactive Practice - Complete the following table.
Symbol
p+
n0
eSymbol
p+
1
H
1
2
H
1
4
He
2
5
He
2
6
Li
3
7
Li
3
n0
e-
17
O
8
39
K
19
40
K
19
235
U
92
244
Pu
94
56
Fe3+
26
3) Give the numbers of neutrons, protons, and electrons in the atom of each of the following isotopes:
(a) radium-226
(b) cesium-137
(c) iodine-131
4) Using standard atomic notation, write the symbol for the isotope of plutonium (Pu) with 146 neutrons.
5) Write the symbols of the isotopes that contain the following:
a. An isotope of silver whose atoms have 63 neutrons.
b. An isotope of strontium whose atoms have 52 neutrons.
c. An isotope of lead whose atoms have 126 neutrons.
d. An isotope of fluorine whose atoms have 9 neutrons.
6) Does radioactive decay support or refute the ‘law of conservation of mass? Justify your answer.
7) Copper is made up of two isotopes, Cu-63 and Cu-65. If the isotopic abundance of copper-63 is
69.15% determine the relative atomic mass of copper.