"Observable" is the one characteristic of event that must exist when <span>using science to investigate physical phenomena. </span>
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^5, 4s^1
Chromium is strange because it moves on to the 4s orbital instead of filling the 3d orbital with that last electron. Tricky.
Mark as brainliest if this helped! :)
Decreased, this is due to the roots of the plants holding the soil together
