8. When rubidium and fluorine combine to produce the compound RbF, che ions formed have the same electron configuration as atoms of
a neon, only
b both argon and neon
c both krypton and neon
d both xenon and neon

The answer is C, both krypton and neon.

Explanation:

I got the answer wrong and my teacher told me that c is the right answer choice

the answer is either b or c

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.