for most of the lanthanides the ionsiation energy to lose a fourth electron will be so large that it cannot be compensated for by bond formation,this is due to the 4f electrons which are shielded and can be regarded as "core electrons".in general it can be said that I4~2(I3)~4(I2)~8(I1)
however for Eu and Yb +2 will be the favoured O.S. due to the presence of a half filled(7e) and a filled 4f shell(14e) respectively
the +4 oxidation state is also possible
The oxidation state of tungsten in its most stable compound is 6.
Cerium is known to exist in the +3 and +4 oxidation states. In its +4 oxidation state, cerium is relatively stable due to its half-filled f-orbital, which provides additional stability. This makes cerium a unique element as most lanthanides almost exclusively exhibit a +3 oxidation state.
Manganese has oxidation states from +7 to -3. In elemental state it is oxidation state 0.
The most common oxidation number for nickel is +2. Nickel is a transition metal that can also exhibit oxidation states of +1, +3, and +4, but the +2 oxidation state is the most stable and commonly observed.
+4 is the most common and the most stable oxidation number
The oxidation state of tungsten in its most stable compound is 6.
Ytterbium typically exhibits two common oxidation states: +2 and +3. The +3 oxidation state is the most stable and prevalent in compounds, while the +2 state is less common and usually found in specific environments. As a lanthanide, ytterbium can lose two or three electrons, resulting in these positive ion charges.
Cerium is known to exist in the +3 and +4 oxidation states. In its +4 oxidation state, cerium is relatively stable due to its half-filled f-orbital, which provides additional stability. This makes cerium a unique element as most lanthanides almost exclusively exhibit a +3 oxidation state.
Technetium oxidation states are between -1 and +7; the most usual valences are +3, +4 and +7.
because in aqueous state copper has minimum hydration enthalpy in an oxidation state of +2, so it is most stable in +2 oxidation state
Manganese has oxidation states from +7 to -3. In elemental state it is oxidation state 0.
The most common oxidation number for nickel is +2. Nickel is a transition metal that can also exhibit oxidation states of +1, +3, and +4, but the +2 oxidation state is the most stable and commonly observed.
+4 is the most common and the most stable oxidation number
The most stable oxidation state of francium is +1. Francium readily loses its single valence electron to attain a stable electron configuration similar to the noble gas configuration of cesium.
alkali earth metals Berylium, Magnesium, Calcium, Strontium, Barium
An element's most likely oxidation state is often related to its number of valence electrons. The oxidation state is typically the charge an atom assumes when it forms ions, and it tends to be the same as the number of valence electrons the atom gains or loses to achieve a stable electron configuration.
The most common oxidation number is +II. The charge and number for cobalt is +2.