Atomic and nuclear properties of materials:
Nitrogen gas (N₂) (N )

Quantity	Value	Units	Value	Units
Atomic number	7
Atomic mass	14.0067(2)	g mole-1
Specific gravity (20° C, 1 atm)	1.17E-03	g cm-3
Mean excitation energy	82.0	eV
Minimum ionization	1.825	MeV g-1cm2	2.127E-03	MeV cm-1
Nuclear collision length	61.1	g cm-2	5.242E+04	cm
Nuclear interaction length	89.7	g cm-2	7.696E+04	cm
Pion collision length	88.4	g cm-2	7.583E+04	cm
Pion interaction length	121.7	g cm-2	1.044E+05	cm
Radiation length	37.99	g cm-2	3.260E+04	cm
Critical energy	91.73	MeV (for e-)	89.71	MeV (for e+)
Molière radius	8.78	g cm-2	7536.	cm
Plasma energy	0.70	eV
Muon critical energy	1154.	GeV
Melting point	63.15	K	-210.0	C
Boiling point @ 1 atm	77.29	K	-195.9	C
Index of refraction (@ STP, Na D)	298.	(n-1)x106

For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PS PDF TEXT
Table of muon dE/dx and Range: PS PDF TEXT
Explanation of some entries
Table of isotopes Warning: may not be current
x ray mass attenuation coefficients