Answer:
D
Explanation:
water freezes in cracks in rock
I believe the answer is option B. The bonded pair of valence electrons are shown using circles
Answer:
Radium
Explanation:
It has the highest atomic number so it would have more shells, making it larger than the others.

Actually Welcome to the concept of Ions .
If we see the reaction.
H2SO4 ==> 2H+ + (SO4)2-
Here you can see, H+ ( Hydrogen ions) and (SO4) 2- ( sulphate ions) are the ions when the H2SO4 is dissolved in water.