Bromine (Br) VS Krypton (Kr)
A definitive side-by-side comparison of two essential element profiles.
VS
Main Differences
Bromine (Br) is an element in the halogens category with an atomic number of 35. Krypton (Kr) is an element in the noble gases category with an atomic number of 36.
Krypton (Kr) is 1.2x denser than Bromine (Br). Furthermore, Bromine (Br) melts at a significantly higher temperature than Krypton (Kr) (a difference of 150.0 Kelvin).
Where do the names come from?
Br Bromine (Br) Naming History
The name Bromine comes from the Greek ''bromos'' meaning stench.
Kr Krypton (Kr) Naming History
The name Krypton is derived from the Greek ''kryptos'', meaning hidden.
Related Comparisons
Compare
Bromine (Br)
Krypton (Kr)
Category
Halogens
Noble Gases
Atomic Number
35
36
Symbol
Br
Kr
Atomic Mass
79.904 u
83.798 u
Group
17
18
Period
4
4
Block
p-block
p-block
Standard State (at 20°C)
liquid
gas
Density
3.12 g/cm³
3.749 g/L g/cm³
Melting Point (°C)
−7.2°C
−157.37°C
Melting Point (°F)
19°F
−251.27°F
Melting Point (K)
265.8 K
115.79 K
Boiling Point (°C)
58.8°C
−153.415°C
Boiling Point (°F)
137.8°F
−244.147°F
Boiling Point (K)
332 K
119.93 K
Year Discovered:
1826
1898
CAS Number
7726-95-6
7439-90-9
Origin of Name:
The name comes from the Greek ''bromos'' meaning stench.
The name is derived from the Greek ''kryptos'', meaning hidden.