Polar bond is formed by 2 non-metal atoms which have a significant difference in electronegativity.
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Here are some rules:
1. The oxidation state of a free element (uncombined element) is zero.2. For a simple (monatomic) ion, the oxidation state is equal to the net charge on the ion.3. Hydrogen has an oxidation state of +1 and oxygen has an oxidation state of −2 when they are present in most compounds.
The oxidation number of Fe in Fe(NO3)2 is +3.
Answer:
Metal Color
Cobalt Pink (when hydrated)
Copper Blue
Iron (II) Green pale
Iron (III) Reddish brown
Answer:
B. Electrons have the most mass of the
subatomic particles
Compared to the mass of neutron and proton, mass of electron is negligible.