Which of the following would have an electrostatic force of attraction between them ? cl- and 02- fr+ and p3- na+ and at cs* and li+

Fr+ and P3-

This is because the Fr atom has a negative charge and P3 atom has a negative charge, these two atoms have an electrostatic force of attraction because they both need full outer shell of electrons to be a stable atom.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

put the answers   and i could answer.