Answer: A) Sodium Na and Magnesium Mg
Explanation:
In the period table, you can see that Sodium (group 1) has 11 protons, and Magnesium (group 2) has 12 protons. 11+12=23 protons
I think it is rarefaction. But im not sure
Density= Mass/Volume I am positive I just had an assignment on this
K value of water is 1x 10^-14
