CH 221 Class Presentation Elements - Taken and Available

Use the periodic table below to find an element which is still available (Green) - do not pick a previously reserved element (Blue), those elements have been claimed.

Email me directly to request an element (and please list alternatives) - I will email you regarding the element you are assigned, and I will assign you one if your choices have already been claimed. If you don't receive a response email from me within 48 hours, please re-submit your request promptly.

Class Presentation Elements Available (Green) and Taken (Blue) - Last Updated: October 10, 2026

Elements in Blue are not avaiable!
Group IA 2A   3B 4B 5B 6B 7B 8B 8B 8B 1B 2B 3A 4A 5A 6A 7A 8A
Period
1 1
H		 2
He
2 3
Li		 4
Be		 5
B		 6
C		 7
N		 8
O		 9
F		 10
Ne
3 11
Na		 12
Mg		 13
Al		 14
Si		 15
P		 16
S		 17
Cl		 18
Ar
4 19
K		 20
Ca		 21
Sc		 22
Ti		 23
V		 24
Cr		 25
Mn		 26
Fe		 27
Co		 28
Ni		 29
Cu		 30
Zn		 31
Ga		 32
Ge		 33
As		 34
Se		 35
Br		 36
Kr
5 37
Rb		 38
Sr		 39
Y		 40
Zr		 41
Nb		 42
Mo		 43
Tc		 44
Ru		 45
Rh		 46
Pd		 47
Ag		 48
Cd		 49
In		 50
Sn		 51
Sb		 52
Te		 53
I		 54
Xe
6 55
Cs		 56
Ba		 * 71
Lu		 72
Hf		 73
Ta		 74
W		 75
Re		 76
Os		 77
Ir		 78
Pt		 79
Au		 80
Hg		 81
Tl		 82
Pb		 83
Bi		 84
Po		 85
At		 86
Rn
7 87
Fr		 88
Ra		 ** 103
Lr		 104
Rf		 105
Db		 106
Sg		 107
Bh		 108
Hs		 109
Mt		 110
Ds		 111
Rg		 112
Cn		 113
Nh		 114
Fl		 115
Mc		 116
Lv		 117
Ts		 118
Og
 
*Lanthanides * 57
La		 58
Ce		 59
Pr		 60
Nd		 61
Pm		 62
Sm		 63
Eu		 64
Gd		 65
Tb		 66
Dy		 67
Ho		 68
Er		 69
Tm		 70
Yb
**Actinides ** 89
Ac		 90
Th		 91
Pa		 92
U		 93
Np		 94
Pu		 95
Am		 96
Cm		 97
Bk		 98
Cf		 99
Es		 100
Fm		 101
Md		 102
No

My deep thanks to the authors of the (now expired) WebElements.com page for their wonderful website!

Here are the available elements listed in numerical order: (unavailable elements have been removed)

 

57 La Lanthanum
59 Pr Praseodymium

61 Pm Promethium
62 Sm Samarium
65 Tb Terbium
68 Er Erbium
69 Tm Thulium
70 Yb Ytterbium

85 At Astatine
89 Ac Actinium

91 Pa Protactinium
97 Bk Berkelium
98 Cf Californium
99 Es Einsteinium
100 Fm Fermium

101 Md Mendelevium
103 Lr Lawrencium
104 Rf Rutherfordium
105 Db Dubnium
108 Hs Hassium
109 Mt Meitnerium

111 Rg Rontgenium
113 Nh Nihonium
114 Fl Flerovium
115 Mc Moscovium
116 Lv Livermorium
117 Ts Tennessine
118 Og Oganesson

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