CHEMICAL ELEMENT

“Relative atomic mass” in brackets is nucleon number of most stable isotope.
ELEMENT	SYMBOLE	PROTON NO / ATOMIC NO	RELATIVE ATOMIC MASS
actinium	Ac	89	| 227 |
aluminium	Al	13	26.9815
americium	Am	95	| 243 |
antimony	Sb	51	121.75
Argon	Ar	18	39.948
arsenic	As	33	74.9216
astatine	At	85	| 210 |
barium	Ba	56	137.34
Berkelium	Bk	97	| 247 |
beryllium	Be	4	9.0122
bismuth	Bi	83	208.98
boron	B	5	10.81
bromine	Br	35	79.904
cadmium	Cd	48	112.40
caesium	Cs	55	132.905
calcium	Ca	20	40.08
californium	Cf	98	| 251 |
carbon	C	6	12.011
ELEMENT	SYMBOLE	PROTON NO / ATOMIC NO	RELATIVE ATOMIC MASS
cerium	Ce	58	140.12
chlorine	Cl	17	35.453
chromium	Cr	24	51.996
cobalt	Co	27	58.9332
copper	Cu	29	63.546
curium	Cm	96	| 247 |
dysprosium	Dy	66	162.50
einsteinium	Es	99	| 254 |
erbium	Er	68	167.25
europium	Eu	63	151.96
fermium	Fm	100	| 257 |
fluorine	F	9	18.9984
francium	Fr	87	| 247 |
gadolinium	Gd	64	157.25
gallium	Ga	31	69.72
germanium	Ge	32	72.59
gold	Au	79	196.967
hafnium	Hf	72	178.49
helium	He	2	4.0026
ELEMENT	SYMBOLE	PROTON NO / ATOMIC NO	RELATIVE ATOMIC MASS
holmium	Ho	67	164.930
hydrogen	H	1	1.00797
indium	In	49	114.82
iodine	I	53	126.9044
iridium	Ir	77	192.2
iron	Fe	26	55.847
krypton	Kr	36	83.80
lanthanum	La	57	138.91
lawrencium	Lr	103	| 257 |
lead	Pb	82	207.19
lithium	Li	3	6.939
lutetium	Lu	71	174.97
magnesium	Mg	12	24.305
manganese	Mn	25	54.936
mendelevium	Md	101	| 258 |
mercury	Hg	80	200.59
molybdenum	Mo	42	95.94
neodymium	Nd	60	144.24
neon	Ne	10	20.179
ELEMENT	SYMBOLE	PROTON NO / ATOMIC NO	RELATIVE ATOMIC MASS
neptunium	Np	93	| 237 |
nickel	Ni	28	58.71
niobium	Nb	41	92.906
nitrogen	N	7	14.0067
nobelium	No	102	| 255 |
osmium	Os	76	190.2
oxygen	O	8	15.9994
palladium	Pd	46	106.4
phosphorus	P	15	30.9738
platinum	Pt	78	195.09
plutonium	Pu	94	| 244 |
polonium	Po	84	| 209 |
potassium	K	19	39.102
praseodymium	Pr	59	140.907
promethium	Pm	61	| 145 |
protactinium	Pa	91	| 231 |
radium	Ra	88	| 226 |
radon	Rn	86	| 222 |
rhenium	Re	75	186.20
ELEMENT	SYMBOLE	PROTON NO / ATOMIC NO	RELATIVE ATOMIC MASS
rhodium	Rh	45	102.905
rubidium	Rb	37	85.47
ruthenium	Ru	44	101.07
samarium	Sm	62	150.35
scandium	Sc	21	44.956
selenium	Se	34	78.96
silicon	Si	14	28.086
silver	Ag	47	107.868
sodium	Na	11	22.9898
strontium	Sr	38	87.62
sulphur	S	16	32.064
tantalum	Ta	73	180.948
technetium	Tc	43	| 97 |
tellurium	Te	52	127.60
terbium	Tb	65	158.924
thallium	Tl	81	204.73
thorium	Th	90	232.038
thulium	Tm	69	168.934
tin	Sn	50	118.69
ELEMENT	SYMBOLE	PROTON NO / ATOMIC NO	RELATIVE ATOMIC MASS
titanium	Ti	22	47.90
tungsten	W	74	183.85
uranium	U	92	283.03
vanadium	V	23	50.942
Wolfram (tungsten)	W	74	183.85
xenon	Xe	54	131.30
ytterbium	Yb	70	173.04
yttrium	Y	39	88.905
zinc	Zn	30	65.37
zirconium	Zr	40	91.22