The answer is 3.
That is if an atom has 5 electrons in its outer shell, then it has 3 unpaired electrons.
As the outer shell have 1 s orbital too and that is fully filled and not available for bonding so it must have 3 unpaired electrons.
So the number of unpaired electrons in an atom that is having 5 electrons in its outer shell is 3.
Thus, there are 1.47 × 10^(23) molecules present in 122 grams of NO2.
A penny for the scratch test (low hardness)a hand lens for inspection a peice of tile for a streak test a geologic hammer to test for cleavage of fracture and the pocket knife for the scratch test (high hardness)
Actually its the second and fourth one for sure! If you just put one it only gives parcel credit. ;-;
Atoms of the element beryllium would most likely behave similar to the way d lithium behaves
