Epsilon-delta would be the green letter that is used in the precision definition of a limit. (ε, δ).
Answer:
atom are very tiny partical
I think you mean ionic bond and not conic bond. The pair of elements that form an ionic bond are barium and chlorine.
Answer: 4.5 x 10e-7
Explanation: 450 x 1e+9 = correct answer
Multiply amount of nanometers by 1e+9 to get the approximate result in meters.
