Question

Give One Word. 1. A noble Gas with 2 shells 2. The element in period 3 which does not form oxide. 3. An Alkali metal in period 2 and Halogen in period 4. 4. An Element which does not have a neutron. 5. The most reactive non metal.

Answer 1

Answer:

Explanation:  1)heleium

                         2)Argon

                           3)lithium and bromine respectively

                            4)protium(isotope of hydrogen H2^2)

                              5)flourine

          hope this ans helps u