HELP ASAP! WILL GIVE! Match each of the unknown ions to its appropriate description. 1.B+ 2.A− 3.D^2+ 4.C^2− a. A nonmetal that gained one electron b. A metal that lost one electron c. A nonmetal that gained two electrons d. A metal that lost two electrons

1B.a metal that lost one electron

4C a non metal that gained two electrons

h let me think

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.