I’m thinking maybe b and d but I’m not sure I wanna be 100% sure

A and C

Explanation:

It's not B because ...the atomic number refers to the number of protons (not electrons)  in the nucleus of an atom.

It's not D because the number of protons  (not neutrons) determines which kind of element an atom is.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml