D. The number of electrons equals the atomic number for a neutral element. Each number after the letter refers to the number of electrons in that shell. So for D, 2+2+6+2+6+2 = 20 electrons, which is equal to the atomic number.
Answer:
0.0931 is the ans i think
You should clean up after every investigation because if you leave a mess, maybe another detective will come in and get lost because of the mess you left.
it means two oxygen atoms
The exponential is 3.007 times 10 to the -5