Chemistry

Periodic table Relative Atomic Masses in tabular form

The Table below gives the relative atomic masses and the symbols of the elements. The relative atomic masses are accurate to one decimal place.

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Element	Symbol	A_r	Element	Symbol	A_r	Element	Symbol	A_r
Actinium	Ac	–	Hafnium	Hf	178.5	Potassium	K	39.1
Aluminium	Al	27.0	Hahnium	Ha	–	Praseodymium	Pr	140.9
Americium	Am	–	Helium	He	4.0	Promethium	Pm	–
Antimony	Sb	121.8	Holmium	Ho	164.9	Protactinium	Pa	–
Argon	Ar	39.9	Hydrogen	H	1.0	Radium	Ra	–
Arsenic	As	74.9	Indium	In	114.8	Radon	Rn	–
Astatin	At	–	Iodine	I	126.9	Rhenium	Re	186.2
Barium	Ba	137.3	Iridium	Ir	192.2	Rhodium	Rh	102.9
Berkelium	Bk	–	Iron	Fe	55.8	Rubidium	Rb	85.5
Beryllium	Be	9.0	Krypton	Kr	83.8	Ruthenium	Ru	101.1
Bismuth	Bi	209.0	Kurebatovium	Ku	–	Samarium	Sm	150.4
Boron	B	10.8	Lanthanum	La	138.9	Scandium	Sc	45.0
Bromine	Br	79.9	Lawrencium	Lr	–	Selenium	Se	79.0
Cadmium	Cd	112.4	Lead	Pb	207.2	Silicon	Si	28.1
Caesium	Cs	132.9	Lithium	Li	6.9	Silver	Ag	107.9
Calcium	Ca	40.1	Lutetium	Lu	175.0	Sodium	Na	23.0
Californium	Cf	–	Magnesium	Mg	24.3	Stronium	Sr	87.6
Carbon	C	12.0	Manganese	Mn	54.9	Sulphur	S	32.1
Cerium	Ce	140.1	Mendelevium	Md	–	Tantalum	Ta	180.9
Chlorine	Cl	35.5	Mercury	Hg	200.6	Technetium	Tc	–
Chromium	Cr	52.0	Molybdenum	Mo	95.9	Tellurim	Te	127.6
Cobalt	Co	58.9	Neodynium	Nd	144.2	Terbium	Tb	158.9
Copper	Cu	63.5	Nickel	Ni	58.7	Thallium	Ti	204.4
Curium	Cm	–	Niobium	Nb	92.9	Thorium	Th	232.0
Dysprosium	Dy	162.5	Nitrogen	N	14.0	Thuliam	Tm	169.9
Einsteinium	Es	–	Nobelium	No	–	Tin	Sn	118.7
Erbium	Er	167.3	Osmium	Os	190.2	Titanium	Ti	47.9
Europium	Eu	152.0	Oxygen	O	16.0	Tungsten	W	183.9
Fermium	Fm	–	Palladium	Pd	106.4	Uranium	U	238.0
Flourine	F	19.0	Phosphorus	P	31.0	Vanadium	V	50.9
Francium	Fr	–	Platinum	Pt	195.1	Xenon	Xe	131.3
Gadolinium	Gd	157.3	Plutonium	Pu	–	ytterbium	Yb	173.0
Gallium	Ga	69.7	Polonium	Po	–	Yttrium	Y	88.9
Germanium	Ge	72.6	Neptonium	Np	–	Zinc	Zn	65.4
Gold	Au	197.0	Neon	Ne	20.2	Zirconium	Zr	91.2