Question

The Atomic No. Of Two Elements A and B are 17 and 16. Which One is more reactive ? Which particles were used in his experiment ?​

Answer 1

Answer:

chlorine (17) will be more reactive

Explanation:

as according to period rule when we move left to right reactivity first decrease than increases

Answer 2

Answer:17

Explanation:An element whose atomic number is 17 will need only one more electron in order to completely fill its octet. Thus, by gaining one electron it will become stable.

Whereas element whose atomic number is 16 will require two electrons in order to completely fill its octet. Thus, by gaining two electrons it will become stable.

Thus, we can conclude the element which requires only one electron to fill its octet will be more reactive. Hence, element A with atomic no. 17 is more reactive.