Answer:
When the metal of the ionic compound has multiple oxidation states.
Explanation:
Nickel (Ni - At No 28) has multiple oxidation states* => −2, −1, 0, +1,[2] +2, +3, +4[3] (a mildly basic oxide)*. When naming compound of nickel on needs to include a roman numeral in parenthesis after the symbol of the element in order to identify which oxidation state is relevant.
examples
Nickel Halide derivatives include
NiCl => nickel(I) chloride
NiCl₂ => nickel(II) chloride
NiCl₃ => nickel (III) chloride
Such is important in that each of the compounds have different physical and chemical properties due to variations in oxidation states of nickel.
https://en.wikipedia.org/wiki/Nickel
Answer:c c c c c c c c c c c c c c c c c c c c c c c c c c cc c c c c c c c c
cc
Explanation:
Answer:
KE = 1/2 mv^2=0.5x 10 X 20^2= 800
Explanation
Answer:
A: Beryllium (Be)
Explanation:
the traits listed are traits of metals, and beryllium is the only choice presented that is a metal.
