How many electrons, protons, and neutrons are contained in the 17o?

The Atomic Number and Atomic Mass of ¹⁷O are 8 and 17 respectively.

Atomic Number:
                         Atomic Number of Element is the Number of Protons contained by the Element. So, there are 8 Protons in ¹⁷O.

Atomic Mass:
                     Atomic Mass of Element is the total number of Protons and Neutrons present in the Nucleus of that element.
So,
                    Atomic Mass  =  # of Protons + # of Neutrons

As the Atomic mass of ¹⁷O is 17 and it has 8 protons, So # of Neutrons are calculated as,

                     # of Neutrons  =  Atomic Mass - # of Protons

                     # of Neutrons  =  17 - 8

                     # of Neutrons  =  9
And,
As there is no charge on ¹⁷O, so the number of Electrons and Protons are equal. i.e.
                     # of Electrons  =  8

Result:
             In ¹⁷O Number of Neutrons are 9, Number of Protons are 8 and Number of Electrons are 8.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na