Step 5: Calculate H*IOH-Ratios for More Extreme pH Solutions What is the concentration of H+ ions at a pH = 11?
mol/L
Now, find the concentration of H+ ions to OH-ions listed
in Table B of your Student Guide for a solution at a pH =
11. Then divide the Ht concentration by the OH-
concentration. Record these concentrations and ratio in
Table C.
What is the concentration of OH-ions at a pH = 11?
mol/L
What is the ratio of H+ ions to OH-ions at a pH = 11?
:1, OR 1:

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the answer your looking for is c).