| Index: > A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
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| Group | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16The chalcogens are the name for the periodic table group 16 (old-style: VIB or VIA) in the periodic table. It consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), the radioactive polonium (Po), and the synthetic ununhexium (Uuh) | 17The halogens are a chemical series. They are the elements in Group 17 (old-style: VII or VIIA) of the periodic table: fluorine, chlorine, bromine, iodine, and astatine. The word comes from Greek roots meaning "salt" and "creator". These elements are diato | 18The noble gases are a chemical series. They are the elements in group 18 (old-style Group 0) of the periodic table; specifically helium, neon, argon, krypton, xenon and radon. The term noble gas comes from the fact that, just like the common view of human | ||
| PeriodIn the periodic table of the elements, a period is a row of the table. The number of electron shells an atom has determines what period it belongs to. Each shell is divided into different subshells, which as atomic number increases are filled in roughly t | ||||||||||||||||||||
| 1A period 1 element is one of the chemical elements in the first row (or period of the periodic table of the elements. These are: Chemical elements in the first period Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 #Name 1 H 2 He e--conf. Alkali metals | 1 Hhydrogen helium H Li Full table General Name, Symbol, NumberHydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1 , s Density, Hardness 0. 0899 kg/m3, NA Appearance colorless Atomic properties Atomic weight 1. 00794 amu Atomic radius (ca |
2 HeHelium is a colorless, odorless, tasteless chemical element, one of the noble gases of the periodic table of elements. Its boiling and melting points are the lowest among the elements; except in extreme conditions, it exists only as a gas. The second most |
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| 2 | 3 Li |
4 Be |
5 B |
6 C |
7 N |
8 O |
9 F |
10 Ne |
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| 3 | 11 Na |
12 Mg |
13 Al |
14 Si |
15 P |
16 S |
17 Cl |
18 Ar |
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| 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 |
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| 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 |
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| 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 |
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| 7 | 87 Fr |
88 Ra |
* * |
103 Lr |
104 Rf |
105 Db |
106 Sg |
107 Bh |
108 Hs |
109 Mt |
110 Ds |
111 Rg |
112 Uub |
113 Uut |
114 Uuq |
115 Uup |
116 Uuh |
117 Uus |
118 Uuo |
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| * 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 |
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| ** 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 |
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| Metals | Metalloids | Nonmetals |
Color coding for atomic numbers:
| Standard table | Vertical table | Table with names | Names and atomic masses (large) | Names and atomic masses (small) | Inline F-block | Elements to 218 | Electron configurations | Metals and non metals | Table by blocks |
| Lists of Elements |
| Name | Atomic symbol | Atomic number | Boiling point | Melting point | Density | Atomic mass
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| Group | Period | Series | Block |