How might 15% solution of flubber be made

               Adding 15 g of Flubber with 85 g of inert solvent will result in the formation of 15 % solution.

              W/V %  =  15 %

              Weight of Flubber  =  ?

              Weight of Solution  =  ?

              Let's suppose we are going to prepare a 100 mL solution. The using following formula we can calsulate the amount of Flubber required.

              W / W %  =  (Weight of Flubber ÷ Weight of Solution) × 100

Putting values,

              15 %  =  (Weight of Flubber ÷ 100 g) × 100

Solving for Weight of flubber,

              Weight of Flubber  =  (15 × 100 g) ÷ 100

              Weight of Flubber  =  15 g

Hence, taking 15 g of Flubber and adding it to 85 g of solvent will result in the formation of 15% Flubber solution.

a electronegativity decreases beacuse the size of nucleus is bigger.

since electrons are negative the answer is neagtaive