Europium
Table:
Europium
Pronunciation	/jʊəˈroʊpiəm/ ​(yoor-OH-pee-əm)
Appearance	silvery white, with a pale yellow tint; but rarely seen without oxide discoloration
Standard atomic weight Ar, std(Eu)	151.964(1)
Atomic number (Z)	63
Group	group n/a
Period	period 6
Block	f-block
Element category	Lanthanide
Electron configuration	[Xe] 4f7 6s2

Electrons per shell

2, 8, 18, 25, 8, 2
Phase at STP	solid
Melting point	1099 K ​(826 °C, ​1519 °F)
Boiling point	1802 K ​(1529 °C, ​2784 °F)
Density (near r.t.)	5.264 g/cm3
when liquid (at m.p.)	5.13 g/cm3
Heat of fusion	9.21 kJ/mol
Heat of vaporization	176 kJ/mol
Molar heat capacity	27.66 J/(mol·K)
Oxidation states	+1, +2, +3 (a mildly basic oxide)
Electronegativity	Pauling scale: 1.2
Ionization energies

1st: 547.1 kJ/mol
2nd: 1085 kJ/mol
3rd: 2404 kJ/mol

Atomic radius	empirical: 180 pm
Natural occurrence	primordial
Thermal expansion	poly: 35.0 µm/(m·K) (at r.t.)
Thermal conductivity	est. 13.9 W/(m·K)
Electrical resistivity	poly: 0.900 µΩ·m (at r.t.)
Magnetic ordering	paramagnetic
Magnetic susceptibility	+34,000.0·10−6 cm3/mol
Young's modulus	18.2 GPa
Shear modulus	7.9 GPa
Bulk modulus	8.3 GPa
Poisson ratio	0.152
Vickers hardness	165–200 MPa
CAS Number	7440-53-1
Naming	after Europe
Discovery and first isolation	Eugène-Anatole Demarçay (1896, 1901)

Using the given table, decide if the statement is entailed, neutral, or refuted by the data. Give your final answer in JSON format {"answer": "YOUR ANSWER"}.

Assertion: Europium was discovered at the turn of the 20th century.

answer: entailed