What are the electrons called in the lectrons called in the outermost energy level of an atom? why are they important (10) (b) two

This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.

Explanation:

They are important to an atom because the fewer valence electrons that the atom holds, the less stable it becomes.

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