What is the atomic number of Radium?
48
88
68
98
Correct answer is B
No explanation has been provided for this answer.
What is the atomic number of Francium?
56
203
101
87
Correct answer is D
No explanation has been provided for this answer.
What is the atomic number of Radon?
86
203
101
17
Correct answer is A
No explanation has been provided for this answer.
What is the atomic number of Astatine?
67
100
40
85
Correct answer is D
No explanation has been provided for this answer.
What is the atomic number of Polonium?
7.7
106
16
84
Correct answer is D
No explanation has been provided for this answer.