Bromine
Table:
Bromine
Pronunciation	/ˈbroʊmiːn, -mɪn, -maɪn/ ​(BROH-meen, -⁠min, -⁠myn)
Appearance	reddish-brown
Standard atomic weight Ar, std(Br)	[79.901, 79.907] conventional: 79.904
Atomic number (Z)	35
Group	group 17 (halogens)
Period	period 4
Block	p-block
Element category	Reactive nonmetal
Electron configuration	[Ar] 3d10 4s2 4p5

Electrons per shell

2, 8, 18, 7
Phase at STP	liquid
Melting point	(Br2) 265.8 K ​(−7.2 °C, ​19 °F)
Boiling point	(Br2) 332.0 K ​(58.8 °C, ​137.8 °F)
Density (near r.t.)	Br2, liquid: 3.1028 g/cm3
Triple point	265.90 K, ​5.8 kPa
Critical point	588 K, 10.34 MPa
Heat of fusion	(Br2) 10.571 kJ/mol
Heat of vaporisation	(Br2) 29.96 kJ/mol
Molar heat capacity	(Br2) 75.69 J/(mol·K)
Oxidation states	−1, +1, +3, +4, +5, +7 (a strongly acidic oxide)
Electronegativity	Pauling scale: 2.96
Ionisation energies

1st: 1139.9 kJ/mol
2nd: 2103 kJ/mol
3rd: 3470 kJ/mol

Atomic radius	empirical: 120 pm
Covalent radius	120±3 pm
Van der Waals radius	185 pm
Natural occurrence	primordial
Speed of sound	206 m/s (at 20 °C)
Thermal conductivity	0.122 W/(m·K)
Electrical resistivity	7.8×1010 Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Magnetic susceptibility	−56.4·10−6 cm3/mol
CAS Number	7726-95-6
>
Discovery and first isolation	Antoine Jérôme Balard and Carl Jacob Löwig (1825)

From the table, decide if the statement is entailed, neutral, or refuted by the data. Output only the JSON object {"answer": "YOUR ANSWER"}.

Hypothesis: Bromine was discovered in the 18th century.

answer: refuted