Answer:
Group 17, 2, 7, 7 electrons
Explanation:
well you can't walk through the air but you can't walk through a concrete wall because all of the solid atoms holding it together

<u>b. a positive cation and a negative anion</u>
✏ Anions are negative in nature while cations are positive in nature. Together they come together by an attractive electrostatic force to form an ionic bond.
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

Answer:
I don't know
Explanation:
Maybe they shouldn't copy each other
I'm not exactly sure which one but I do know that an acid and a base react in a aqueous solution to form water, so i would probably eliminate the ones that aren't aqueous solutions.