Iodine (I) VS Bromine (Br)
A definitive side-by-side comparison of two essential element profiles.
VS
Main Differences
Iodine (I) is an element in the halogens category with an atomic number of 53. Bromine (Br) is an element in the halogens category with an atomic number of 35.
Iodine (I) is 1.6x denser than Bromine (Br). Furthermore, Iodine (I) melts at a significantly higher temperature than Bromine (Br) (a difference of 121.1 Kelvin).
Where do the names come from?
I Iodine (I) Naming History
The name Iodine is derived from the Greek ''iodes'' meaning violet.
Br Bromine (Br) Naming History
The name Bromine comes from the Greek ''bromos'' meaning stench.
Related Comparisons
Compare
Iodine (I)
Bromine (Br)
Category
Halogens
Halogens
Atomic Number
53
35
Symbol
I
Br
Atomic Mass
126.904 u
79.904 u
Group
17
17
Period
5
4
Block
p-block
p-block
Standard State (at 20°C)
solid
liquid
Density
4.933 g/cm³
3.12 g/cm³
Melting Point (°C)
113.7°C
−7.2°C
Melting Point (°F)
236.7°F
19°F
Melting Point (K)
386.85 K
265.8 K
Boiling Point (°C)
184.4°C
58.8°C
Boiling Point (°F)
363.9°F
137.8°F
Boiling Point (K)
457.4 K
332 K
Year Discovered:
1811
1826
CAS Number
7553-56-2
7726-95-6
Origin of Name:
The name is derived from the Greek ''iodes'' meaning violet.
The name comes from the Greek ''bromos'' meaning stench.