Which is a chemical property of iron?

Atomic number

26

Atomic mass

55.85 g.mol -1

Electronegativity according to Pauling

1.8

Density

7.8 g.cm-3 at 20°C

Melting point

1536 °C

Boiling point

2861 °C

Vanderwaalsradius 

0.126 nm

Ionic radius

0.076 nm (+2) ; 0.064 nm (+3)

Isotopes

8

Electronic shell 

[ Ar ] 3d6 4s2

Energy of first ionisation

761 kJ.mol -1

Energy of second ionisation

1556.5 kJ.mol -1

Energy of third ionisation

2951 kJ.mol -1

Standard potential

- o.44 V (Fe2+/ Fe ) ; 0.77 V ( Fe3+/ Fe2+ )

Discovered by

The ancients

1.solid

2.carbon dioxide

3.helium

elements make up everything, and they combine to make compounds.

the answer is c