All elements in the same group
a._have similar chemical proprieties
b._ aren't similar in any way
c._are in the same sate at room temperature
d._have the same boiling and freezing points

false

because it does not have the potential to be entirely used up

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.