Which of the following is the most reactive element of the group 17?
A. Oxygen
B. Sodium
C. Fluorine
D. Magnesium
Answer:C
Which of the following is the most reactive element of the group 17?
A. Oxygen B. Sodium C. Fluorine D. Magnesium
Explanation: As we move down in a group, the size of the atoms of elements goes on increasing. So, fluorine being on the top position in the halogen’s group, is the smallest element and has the maximum tendency to gain an electron to complete its octet. Thus fluorine is the most reactive element of the group 17.