Chlorine (Cl) VS Argon (Ar)
A definitive side-by-side comparison of two essential element profiles.
VS
Main Differences
Chlorine (Cl) is an element in the halogens category with an atomic number of 17. Argon (Ar) is an element in the noble gases category with an atomic number of 18.
Chlorine (Cl) is 1.8x denser than Argon (Ar). Furthermore, Chlorine (Cl) melts at a significantly higher temperature than Argon (Ar) (a difference of 87.8 Kelvin).
Where do the names come from?
Cl Chlorine (Cl) Naming History
The name Chlorine is derived from the Greek ''chloros'', meaning greenish yellow.
Ar Argon (Ar) Naming History
The name Argon is derived from the Greek, ''argos'', meaning idle.
Related Comparisons
Compare
Chlorine (Cl)
Argon (Ar)
Category
Halogens
Noble Gases
Atomic Number
17
18
Symbol
Cl
Ar
Atomic Mass
35.45 u
39.95 u
Group
17
18
Period
3
3
Block
p-block
p-block
Standard State (at 20°C)
gas
gas
Density
3.214 g/L g/cm³
1.784 g/L g/cm³
Melting Point (°C)
−101.5°C
−189.34°C
Melting Point (°F)
−150.7°F
−308.81°F
Melting Point (K)
171.6 K
83.8 K
Boiling Point (°C)
−34.04°C
−185.848°C
Boiling Point (°F)
−29.27°F
−302.526°F
Boiling Point (K)
239.11 K
87.3 K
Year Discovered:
1774
1894
CAS Number
7782-50-5
7440-37-1
Origin of Name:
The name is derived from the Greek ''chloros'', meaning greenish yellow.
The name is derived from the Greek, ''argos'', meaning idle.