a piece of sodium in air

Na - Sodium

Sodium (aka natrium) is a ubiquitous, alkali metal. Humphrey Davy electrolysed pure sodium from sodium hydroxide in 1807 in London. Reactions of sodium with water and air are observed by our students.

Atomic number - 11 Density g/mL 0 .97

Atomic weight u 22 .98977 Melting point K 371

Bonding radius A 1 .54 Boiling point K 1156

Atomic radius A 2 .23 Heat of vaporization kJ/mol 96 .96

Ionization Potential V 5 .139 Heat of fusion kJ/mol 2 .598

Electronegativity - 0 .93 Specific heat J/gK 1 .23

The oxide is a strong base.
Crystal are body centered cubic.

Electron config. : [Ne] 3s¹

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Na: Click mass number for decay process, product for element page.

020
447.9 msec
EC,13.887 MeV
Ne-20
20.007348 021
22.49 sec
EC,3.547 MeV
Ne-21
20.997655 022
2.6019 yr
EC,2.842 MeV
Ne-22
21.994436 023 100%

Stable

22.989769 024
14.9590 hr
B-,5.516 MeV
Mg-24
23.990963 024a
20.20 msec
B-,5.988 MeV
Mg-24
23.991470 025
59.1 sec
B-,3.835 MeV
Mg-25
24.989954

026
1.072 sec
B-,9.312 MeV
Mg-26
25.992589 027
301 msec
B-/B-n,9.010
Mg-27/Mg-26
26.994009 028
30.5 msec
B-/B-n,13.990
Mg-28/Mg-27
27.998894 029
44.9 msec
B-/B-n,13.280
Mg-29/Mg-28
29.002812 030
48 msec
B-/B-2n/B-a/B-n,17.480
Mg-30/Mg-28/Ne-26/Mg-29
30.009221 031
17.0 msec
B-/B-2n/B-n,15.880
Mg-31/Mg-29/Mg-30
31.013591 032
13.2 msec
B-/B-2n/B-n,19.100
Mg-32/Mg-30/Mg-31
32.019645

033
8.2 msec
B-/B-2n/B-n,20.300
Mg-33/Mg-31/Mg-32
33.027375 034
5.5 msec
B-/B-2n/B-n,24.100
Mg-34/Mg-32/Mg-33
34.034890 035
1.5 msec
B-/B-n,24.900
Mg-35/Mg-34
35.044230 MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.

Atomic number	-	11		Density	g/mL	0	.97
Atomic weight	u	22	.98977	Melting point	K	371
Bonding radius	A	1	.54	Boiling point	K	1156
Atomic radius	A	2	.23	Heat of vaporization	kJ/mol	96	.96
Ionization Potential	V	5	.139	Heat of fusion	kJ/mol	2	.598
Electronegativity	-	0	.93	Specific heat	J/gK	1	.23
The oxide is a strong base.				Crystal are body centered cubic.
Electron config. : [Ne] 3s¹
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020 447.9 msec EC,13.887 MeV Ne-20 20.007348	021 22.49 sec EC,3.547 MeV Ne-21 20.997655	022 2.6019 yr EC,2.842 MeV Ne-22 21.994436	023 100% Stable 22.989769	024 14.9590 hr B-,5.516 MeV Mg-24 23.990963	024a 20.20 msec B-,5.988 MeV Mg-24 23.991470	025 59.1 sec B-,3.835 MeV Mg-25 24.989954
026 1.072 sec B-,9.312 MeV Mg-26 25.992589	027 301 msec B-/B-n,9.010 Mg-27/Mg-26 26.994009	028 30.5 msec B-/B-n,13.990 Mg-28/Mg-27 27.998894	029 44.9 msec B-/B-n,13.280 Mg-29/Mg-28 29.002812	030 48 msec B-/B-2n/B-a/B-n,17.480 Mg-30/Mg-28/Ne-26/Mg-29 30.009221	031 17.0 msec B-/B-2n/B-n,15.880 Mg-31/Mg-29/Mg-30 31.013591	032 13.2 msec B-/B-2n/B-n,19.100 Mg-32/Mg-30/Mg-31 32.019645
033 8.2 msec B-/B-2n/B-n,20.300 Mg-33/Mg-31/Mg-32 33.027375	034 5.5 msec B-/B-2n/B-n,24.100 Mg-34/Mg-32/Mg-33 34.034890	035 1.5 msec B-/B-n,24.900 Mg-35/Mg-34 35.044230	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass