Usually three will be lost.
Only three electrons.
(NO3)- has three single bonds.
Yttrium (Y) has, for the most part, 39 electrons. In its ion (atom with a charge that has lost or gained electrons) form though, it has 36 electrons.
Atoms that have lost electrons are positive ions, and are called cations.
N(nitrogen) = 7 electrons 3O(three oxygen) = 3* 8 electrons = 24 electrons 7 electrons + 24 electrons = 31 electrons in NO3 ( nitrogen trioxide ) ==============================
it has gain 4 electrons
2 electrons are lost from calcium, forming Ca2+ ion
Usually three will be lost.
two electrons lost
two are lost
Hydrogen shares its electrons to complete the octate so it gains 1 electrons. it can also its electrons.
There is zero NET loss or gain of electrons
Xe neither gain or lose electrons= 0
In N: 2+5(= valence) = 7 electronsIn 3*O: 3*[2+6(= valence)] = 24 electronsIn negative ion charge (-1) = 1 electronIn total 32 ( = 7 + 3*8 + 1 ) of which 5 + 3*6 + 1 = 24 valence electrons in (12) covalent bonds (12 pairs).
Only one electron lost.
Two.