Which type of element is almost always found as a single atom in nature? O A. Alkaline earth metal
O B. Halogen
c. Noble gas
D. Oxygen family element

A . Alkaline earth metal

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.

6.4 cm (max) - 25 cm (min)