Light bulbs works by converting electricity into light by using electric currents. it emits electromagnetic radiation
They all have the same number of protons and electrons but differ in the number of neutrons because they are isotopes.
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Answer:
Colourless
Explanation:
We know that Y^3+ has the electronic configuration of;
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 (the 5s and 4d levels are empty).
According to the crystal field theory, the colour of complexes result from transitions between incompletely filled d orbitals.
As a result of this, complexes with empty or completely filled d orbitals are colourless. Thus, [Y(H2O)6]3 is colourless according to the Crystal Field Theory.
Atomic number
26
Atomic mass
55.85 g.mol<span> -1</span>
Electronegativity according to Pauling
1.8
Density
7.8 g.cm-3 at 20°C
Melting point
1536 °C
Boiling point
2861 °C
<span>Vanderwaalsradius </span>
0.126 nm
Ionic radius
0.076 nm (+2) ; 0.064 nm (+3)
Isotopes
8
<span>Electronic shell </span>
[ Ar ] 3d6 4s2
Energy of first ionisation
761 kJ.mol<span> -1</span>
Energy of second ionisation
1556.5 kJ.mol<span> -1</span>
Energy of third ionisation
2951 kJ.mol<span> -1</span>
Standard potential
- o.44 V (Fe2+/ Fe ) ; 0.77 V ( Fe3+/ Fe2+ )
Discovered by
The ancients
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Read more: <span>http://www.lenntech.com/periodic/elements/fe.htm#ixzz4a5WaFZtx</span></span>