Question

Burning of chlorine​

Answer 1

Explanation:

Jump to Chlorine-iron fire · The element iron can combine with chlorine at high ... reaction, creating a chlorine-iron fire.

Answer 2

Answer:

, 17Cl

A glass container filled with chlorine gas

Chlorine

Pronunciation

/ˈklɔːriːn, -aɪn/ (KLOR-een, -⁠yn)

Appearance

pale yellow-green gas

Standard atomic weight Ar, std(Cl)

[35.446, 35.457] conventional: 35.45

Chlorine in the periodic table

Hydrogen

Helium

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

Neon

Sodium

Magnesium

Aluminium

Silicon

Phosphorus

Sulfur

Chlorine

Argon

Potassium

Calcium

Scandium

Titanium

Vanadium

Chromium

Manganese

Iron

Cobalt

Nickel

Copper

Zinc

Gallium

Germanium

Arsenic

Selenium

Bromine

Krypton

Rubidium

Strontium

Yttrium

Zirconium

Niobium

Molybdenum

Technetium

Ruthenium

Rhodium

Palladium

Silver

Cadmium

Indium

Tin

Antimony

Tellurium

Iodine

Xenon

Caesium

Barium

Lanthanum

Cerium

Praseodymium

Neodymium

Promethium

Samarium

Europium

Gadolinium

Terbium

Dysprosium

Holmium

Erbium

Thulium

Ytterbium

Lutetium

Hafnium

Tantalum

Tungsten

Rhenium

Osmium

Iridium

Platinum

Gold

Mercury (element)

Thallium

Lead

Bismuth

Polonium

Astatine

Radon

Francium

Radium

Actinium

Thorium

Protactinium

Uranium

Neptunium

Plutonium

Americium

Curium

Berkelium

Californium

Einsteinium

Fermium

Mendelevium

Nobelium

Lawrencium

Rutherfordium

Dubnium

Seaborgium

Bohrium

Hassium

Meitnerium

Darmstadtium

Roentgenium

Copernicium

Nihonium

Flerovium

Moscovium

Livermorium

Tennessine

Oganesson

F

↑

Cl

↓

Br

sulfur ← chlorine → argon

Atomic number (Z)

17

Group

group 17 (halogens)

Period

period 3

Block

p-block

Element category

Reactive nonmetal

Electron configuration

[Ne] 3s2 3p5

Electrons per shell

2, 8, 7

Physical properties

Phase at STP

gas

Melting point

(Cl2) 171.6 K (−101.5 °C, −150.7 °F)

Boiling point

(Cl2) 239.11 K (−34.04 °C, −29.27 °F)

Density (at STP)

3.2 g/L

when liquid (at b.p.)

1.5625 g/cm3[1]

Critical point

416.9 K, 7.991 MPa

Heat of fusion

(Cl2) 6.406 kJ/mol

Heat of vaporisation

(Cl2) 20.41 kJ/mol

Molar heat capacity

(Cl2)

33.949 J/(mol·K)

Vapour pressure

P (Pa) 1 10 100 1 k 10 k 100 k

at T (K) 128 139 153 170 197 239

Atomic properties

Oxidation states

−1, +1, +2, +3, +4, +5, +6, +7 (a strongly acidic oxide)

Electronegativity

Pauling scale: 3.16

Ionisation energies

1st: 1251.2 kJ/mol

2nd: 2298 kJ/mol

3rd: 3822 kJ/mol

(more)

Covalent radius

102±4 pm

Van der Waals radius

175 pm

Color lines in a spectral range

Spectral lines of chlorine

Other properties

Natural occurrence

primordial

Crystal structure

orthorhombicOrthorhombic crystal structure for chlorine

Speed of sound

206 m/s (gas, at 0 °C)

Thermal conductivity

8.9×10−3 W/(m·K)

Electrical resistivity

>10 Ω·m (at 20 °C)

Magnetic ordering

diamagnetic[2]

Magnetic susceptibility

−40.5·10−6 cm3/mol[3]

CAS Number

Cl2: 7782-50-5

History

Discovery and first isolation

Carl Wilhelm Scheele (1774)

Recognized as an element by

Humphry Davy (1808)

Main isotopes of chlorine

Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct

35Cl 76% stable

36Cl trace 3.01×105 y β− 36Ar

ε 36S

37Cl 24% stable

viewtalkedit | references

The most common compound of chlorine, sodium chloride (common salt), has been known since ancient times. Around 1630, chlorine gas was first synthesised in a chemical reaction, but not recognised as a fundamentally important substance. Carl Wilhelm Scheele wrote a description of chlorine gas in 1774, supposing it to be an oxide of a new element. In 1809, chemists suggested that the gas might be a pure element, and this was confirmed by Sir Humphry Davy in 1810, who named it from