Different between:

Hologens and 0 element

different between Hologens and 0element

Explanation:

The reactivity of the elements decreases as you decent the group. This can be seen if we observe the reaction between halogens. Elements in the same group in this periodic table have similar chemical properties. Group 0 elements are unreactive nonmetal called the noble gases.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.