Voice changers for mac. We remember from our school chemistry course that every element has its own specific atomic number. It is the same as the number of protons that the atom of each element has, so sometimes atomic number is called proton number. It is always the whole number and it ranges from 1 to 118, according to the number of the element in the Periodic Table. This number can be really important and something essential to know, in relation to a certain chemical element which is the issue of our interest at the moment.
The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present). The number of protons determines how many electrons surround the nucleus, and it is the arrangement of these electrons that.
- It used to be believed that of the first 92 elements on the periodic table (1 is hydrogen and 92 is uranium) that 90 elements occur naturally. Technetium (atomic number 43) and promethium (atomic number 61) were synthesized by man before they were identified in nature. List of the Natural Elements.
- For example, the atomic-ionic radius of chlorine (Cl-) is larger than its atomic radius. The bond length between atoms A and B is the sum of the atomic radii, d AB = r A + r B. CrystalMaker uses Atomic-Ionic radii data from: Slater JC (1964) Journal of Chemical Physics 39:3199-Crystal Radii.
- Atomic number 90: 1 n a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands Synonyms: Th, thorium Types: radiothorium, thorium-228 radioactive isotope of thorium with mass number 228 Type of: metal, metallic element any of several.
Why is this so? Why is the atomic number so important? First of all, it is the number that makes elements different from one another as it shows the number of protons in their nuclei. Also, knowing the atomic number of an element can give us an idea about the position of the element in the Periodic Table. Atomic number of an element never changes: for example, the atomic number of oxygen is always 8, and the atomic number of Chlorine is always 18. The atomic number is marked with the symbol Z, taken from a German word zahl (or atomzahl, which is 'atomic number' in German).
Element Atomic Number 90
This website is created for those who need to know the atomic number of a central chemical element. By using our website, you can do it in just one click and receive short and correct information on this matter. Ptable. There is also some extra summary on every each chemical element which can be found at our website, including the atomic weight of each element, as well as physical and chemical properties of every element and its importance. Use this website at any time when you need to get fast and precise information about atomic or proton number of chemical elements.
List of chemical elements in periodic table with atomic number, chemical symbol and atomic weight. You can sort the elements by clicking on the table headers. Please click on the element name for complete list of element properties.
Atomic Number | Chemical Symbol | Element Name | Atomic Weight (u) |
---|---|---|---|
1 | H | Hydrogen | 1.008 |
2 | He | Helium | 4.003 |
3 | Li | Lithium | 6.94 |
4 | Be | Beryllium | 9.012 |
5 | B | Boron | 10.81 |
6 | C | Carbon | 12.011 |
7 | N | Nitrogen | 14.007 |
8 | O | Oxygen | 15.999 |
9 | F | Fluorine | 18.998 |
10 | Ne | Neon | 20.18 |
11 | Na | Sodium | 22.99 |
12 | Mg | Magnesium | 24.305 |
13 | Al | Aluminium | 26.982 |
14 | Si | Silicon | 28.085 |
15 | P | Phosphorus | 30.974 |
16 | S | Sulfur | 32.06 |
17 | Cl | Chlorine | 35.45 |
18 | Ar | Argon | 39.948 |
19 | K | Potassium | 39.098 |
20 | Ca | Calcium | 40.078 |
21 | Sc | Scandium | 44.956 |
22 | Ti | Titanium | 47.867 |
23 | V | Vanadium | 50.942 |
24 | Cr | Chromium | 51.996 |
25 | Mn | Manganese | 54.938 |
26 | Fe | Iron | 55.845 |
27 | Co | Cobalt | 58.933 |
28 | Ni | Nickel | 58.693 |
29 | Cu | Copper | 63.546 |
30 | Zn | Zinc | 65.38 |
31 | Ga | Gallium | 69.723 |
32 | Ge | Germanium | 72.63 |
33 | As | Arsenic | 74.922 |
34 | Se | Selenium | 78.971 |
35 | Br | Bromine | 79.904 |
36 | Kr | Krypton | 83.798 |
37 | Rb | Rubidium | 85.468 |
38 | Sr | Strontium | 87.62 |
39 | Y | Yttrium | 88.906 |
40 | Zr | Zirconium | 91.224 |
41 | Nb | Niobium | 92.906 |
42 | Mo | Molybdenum | 95.95 |
43 | Tc | Technetium | 98 |
44 | Ru | Ruthenium | 101.07 |
45 | Rh | Rhodium | 102.906 |
46 | Pd | Palladium | 106.42 |
47 | Ag | Silver | 107.868 |
48 | Cd | Cadmium | 112.414 |
49 | In | Indium | 114.818 |
50 | Sn | Tin | 118.71 |
51 | Sb | Antimony | 121.76 |
52 | Te | Tellurium | 127.6 |
53 | I | Iodine | 126.904 |
54 | Xe | Xenon | 131.293 |
55 | Cs | Caesium | 132.905 |
56 | Ba | Barium | 137.327 |
57 | La | Lanthanum | 138.905 |
58 | Ce | Cerium | 140.116 |
59 | Pr | Praseodymium | 140.908 |
60 | Nd | Neodymium | 144.242 |
61 | Pm | Promethium | 145 |
62 | Sm | Samarium | 150.36 |
63 | Eu | Europium | 151.964 |
64 | Gd | Gadolinium | 157.25 |
65 | Tb | Terbium | 158.925 |
66 | Dy | Dysprosium | 162.5 |
67 | Ho | Holmium | 164.93 |
68 | Er | Erbium | 167.259 |
69 | Tm | Thulium | 168.934 |
70 | Yb | Ytterbium | 173.045 |
71 | Lu | Lutetium | 174.967 |
72 | Hf | Hafnium | 178.49 |
73 | Ta | Tantalum | 180.948 |
74 | W | Tungsten | 183.84 |
75 | Re | Rhenium | 186.207 |
76 | Os | Osmium | 190.23 |
77 | Ir | Iridium | 192.217 |
78 | Pt | Platinum | 195.084 |
79 | Au | Gold | 196.967 |
80 | Hg | Mercury | 200.592 |
81 | Tl | Thallium | 204.38 |
82 | Pb | Lead | 207.2 |
83 | Bi | Bismuth | 208.98 |
84 | Po | Polonium | 209 |
85 | At | Astatine | 210 |
86 | Rn | Radon | 222 |
87 | Fr | Francium | 223 |
88 | Ra | Radium | 226 |
89 | Ac | Actinium | 227 |
90 | Th | Thorium | 232.038 |
91 | Pa | Protactinium | 231.036 |
92 | U | Uranium | 238.029 |
93 | Np | Neptunium | 237 |
94 | Pu | Plutonium | 244 |
95 | Am | Americium | 243 |
96 | Cm | Curium | 247 |
97 | Bk | Berkelium | 247 |
98 | Cf | Californium | 251 |
99 | Es | Einsteinium | 252 |
100 | Fm | Fermium | 257 |
101 | Md | Mendelevium | 258 |
102 | No | Nobelium | 259 |
103 | Lr | Lawrencium | 266 |
104 | Rf | Rutherfordium | 267 |
105 | Db | Dubnium | 268 |
106 | Sg | Seaborgium | 269 |
107 | Bh | Bohrium | 270 |
108 | Hs | Hassium | 277 |
109 | Mt | Meitnerium | 278 |
110 | Ds | Darmstadtium | 281 |
111 | Rg | Roentgenium | 282 |
112 | Cn | Copernicium | 285 |
113 | Nh | Nihonium | 286 |
114 | Fl | Flerovium | 289 |
115 | Mc | Moscovium | 290 |
116 | Lv | Livermorium | 293 |
117 | Ts | Tennessine | 294 |
118 | Og | Oganesson | 294 |
Lists of Elements in Periodic Table
Atomic Number 16
You can also list the elements in various ordered properties with printable tables below.
Lists of Elements by Group Number in Periodic Table
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