Tabl Cyfnodol yr Elfennau

Includes interactive visualizations, properties, orbitals, isotopes, and compound mixing.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pnictogens 16 Chalcogens 17 Halogenau 18
1 1 H Hydrogen 1.0081 # Atomig Symbol Enw Pwysau Atomig


C Solidau
Hg Hylifau
H Nwyon
Rf Anhysbys
Metelau Meteloidau Anfetelau
Metel alcalïaidd Metelau daear alcalïaidd Lanthanidau Elfennau cyfnewidiol Metelau eraill Anfetelau eraill Nwyon nobl
Actinidau
Kelvin
°Celsiws
°Fahrenheit
7s
6s
5s
4s
3s
2s
1s
7p
6p
5p
4p
3p
2p
6d
5d
4d
3d
=
m=
n=
5f
4f
s
p
d
f
α Dadfeiliad alffa β− Dadfeiliad beta
p Allyriad proton β+ Allyriad positron
n Allyriad niwtron K+ Daliad electron
SF Ymholltiad digymell   Sefydlog
2 He Heliwm 4.00262 K
2 3 Li Lithiwm 6.942
1
4 Be Beriliwm 9.01222
2
5 B Boron 10.812
3
6 C Carbon 12.0112
4
7 N Nitrogen 14.0072
5
8 O Ocsigen 15.9992
6
9 F Fflworin 18.9982
7
10 Ne Neon 20.1802
8
K
L
3 11 Na Sodiwm 22.9902
8
1
12 Mg Magnesiwm 24.3052
8
2
13 Al Alwminiwm 26.9822
8
3
14 Si Silicon 28.0852
8
4
15 P Ffosfforws 30.9742
8
5
16 S Sylffwr 32.062
8
6
17 Cl Clorin 35.452
8
7
18 Ar Argon 39.9482
8
8
K
L
M
4 19 K Potasiwm 39.0982
8
8
1
20 Ca Calsiwm 40.0782
8
8
2
21 Sc Scandiwm 44.9562
8
9
2
22 Ti Titaniwm 47.8672
8
10
2
23 V Fanadiwm 50.9422
8
11
2
24 Cr Cromiwm 51.9962
8
13
1
25 Mn Manganîs 54.9382
8
13
2
26 Fe Haearn 55.8452
8
14
2
27 Co Cobalt 58.9332
8
15
2
28 Ni Nicel 58.6932
8
16
2
29 Cu Copr 63.5462
8
18
1
30 Zn Sinc 65.382
8
18
2
31 Ga Galiwm 69.7232
8
18
3
32 Ge Germaniwm 72.6302
8
18
4
33 As Arsenig 74.9222
8
18
5
34 Se Seleniwm 78.9712
8
18
6
35 Br Bromin 79.9042
8
18
7
36 Kr Crypton 83.7982
8
18
8
K
L
M
N
5 37 Rb Rwbidiwm 85.4682
8
18
8
1
38 Sr Strontiwm 87.622
8
18
8
2
39 Y Ytriwm 88.9062
8
18
9
2
40 Zr Sirconiwm 91.2242
8
18
10
2
41 Nb Niobiwm 92.9062
8
18
12
1
42 Mo Molybdenwm 95.952
8
18
13
1
43 Tc Technetiwm (98)2
8
18
13
2
44 Ru Rwtheniwm 101.072
8
18
15
1
45 Rh Rhodiwm 102.912
8
18
16
1
46 Pd Paladiwm 106.422
8
18
18
47 Ag Arian 107.872
8
18
18
1
48 Cd Cadmiwm 112.412
8
18
18
2
49 In Indiwm 114.822
8
18
18
3
50 Sn Tun 118.712
8
18
18
4
51 Sb Antimoni 121.762
8
18
18
5
52 Te Telwriwm 127.602
8
18
18
6
53 I Ïodin 126.902
8
18
18
7
54 Xe Senon 131.292
8
18
18
8
K
L
M
N
O
6 55 Cs Cesiwm 132.912
8
18
18
8
1
56 Ba Bariwm 137.332
8
18
18
8
2
57–71 72 Hf Hafniwm 178.492
8
18
32
10
2
73 Ta Tantalwm 180.952
8
18
32
11
2
74 W Twngsten 183.842
8
18
32
12
2
75 Re Rheniwm 186.212
8
18
32
13
2
76 Os Osmiwm 190.232
8
18
32
14
2
77 Ir Iridiwm 192.222
8
18
32
15
2
78 Pt Platinwm 195.082
8
18
32
17
1
79 Au Aur 196.972
8
18
32
18
1
80 Hg Mercwri 200.592
8
18
32
18
2
81 Tl Thaliwm 204.382
8
18
32
18
3
82 Pb Plwm 207.22
8
18
32
18
4
83 Bi Bismwth 208.982
8
18
32
18
5
84 Po Poloniwm (209)2
8
18
32
18
6
85 At Astatin (210)2
8
18
32
18
7
86 Rn Radon (222)2
8
18
32
18
8
K
L
M
N
O
P
7 87 Fr Ffransiwm (223)2
8
18
32
18
8
1
88 Ra Radiwm (226)2
8
18
32
18
8
2
89–103 104 Rf Rutherfordiwm (267)2
8
18
32
32
10
2
105 Db Dubniwm (268)2
8
18
32
32
11
2
106 Sg Seaborgiwm (269)2
8
18
32
32
12
2
107 Bh Bohriwm (270)2
8
18
32
32
13
2
108 Hs Hasiwm (277)2
8
18
32
32
14
2
109 Mt Meitneriwm (278)2
8
18
32
32
15
2
110 Ds Darmstadtiwm (281)2
8
18
32
32
17
1
111 Rg Roentgeniwm (282)2
8
18
32
32
17
2
112 Cn Coperniciwm (285)2
8
18
32
32
18
2
113 Nh Nihonium (286)2
8
18
32
32
18
3
114 Fl Ununcwadiwm (289)2
8
18
32
32
18
4
115 Mc Moscovium (290)2
8
18
32
32
18
5
116 Lv Ununhecsiwm (293)2
8
18
32
32
18
6
117 Ts Tennessine (294)2
8
18
32
32
18
7
118 Og Oganesson (294)2
8
18
32
32
18
8
K
L
M
N
O
P
Q
Am elfennau heb isotopau sefydlog, gosodir rhif màs yr isotop â'r hanner-oes hirraf mewn cromfachau.
57 La Lanthanwm 138.912
8
18
18
9
2
58 Ce Ceriwm 140.122
8
18
19
9
2
59 Pr Praseodymiwm 140.912
8
18
21
8
2
60 Nd Neodymiwm 144.242
8
18
22
8
2
61 Pm Promethiwm (145)2
8
18
23
8
2
62 Sm Samariwm 150.362
8
18
24
8
2
63 Eu Ewropiwm 151.962
8
18
25
8
2
64 Gd Gadoliniwm 157.252
8
18
25
9
2
65 Tb Terbiwm 158.932
8
18
27
8
2
66 Dy Dysprosiwm 162.502
8
18
28
8
2
67 Ho Holmiwm 164.932
8
18
29
8
2
68 Er Erbiwm 167.262
8
18
30
8
2
69 Tm Thwliwm 168.932
8
18
31
8
2
70 Yb Yterbiwm 173.052
8
18
32
8
2
71 Lu Lwtetiwm 174.972
8
18
32
9
2
89 Ac Actiniwm (227)2
8
18
32
18
9
2
90 Th Thoriwm 232.042
8
18
32
18
10
2
91 Pa Protactiniwm 231.042
8
18
32
20
9
2
92 U Wraniwm 238.032
8
18
32
21
9
2
93 Np Neptwniwm (237)2
8
18
32
22
9
2
94 Pu Plwtoniwm (244)2
8
18
32
24
8
2
95 Am Americiwm (243)2
8
18
32
25
8
2
96 Cm Curiwm (247)2
8
18
32
25
9
2
97 Bk Berceliwm (247)2
8
18
32
27
8
2
98 Cf Califforniwm (251)2
8
18
32
28
8
2
99 Es Einsteiniwm (252)2
8
18
32
29
8
2
100 Fm Ffermiwm (257)2
8
18
32
30
8
2
101 Md Mendelefiwm (258)2
8
18
32
31
8
2
102 No Nobeliwm (259)2
8
18
32
32
8
2
103 Lr Lawrenciwm (266)2
8
18
32
32
8
3

Wicipedia - - Tabl Cyfnodol

Tabl Cyfnodol Chemical Element Loading…