What is the atomic number of Neptunium?
93
65
34
66
Correct answer is A
No explanation has been provided for this answer.
What is the atomic number of Uranium?
96
100
89
92
Correct answer is D
No explanation has been provided for this answer.
What is the atomic number of Protactinium?
92
91
40
56
Correct answer is B
No explanation has been provided for this answer.
What is the atomic number of Thorium?
13
66
144
90
Correct answer is D
No explanation has been provided for this answer.
What is the atomic number of Actinium?
87
88
89
90
Correct answer is C
No explanation has been provided for this answer.