Atomic Size report
Atom has long been regarded as the smallest unit of matter. With the discovery of electrons, people realized that atoms could also be subdivided through the early atomic model established by Thomson, Rutherford, Bohr, and others. Modern science generally agrees that atoms are composed of extranuclear electrons and atomic nuclei.
The size of the atom of each element is undoubtedly different. From the periodic table, we know that the atomic radius gradually becomes larger as the atomic number increases. The size of the atoms is not all the same, but there is a size distribution.
In physics and chemistry courses, many people have learned that atoms are indivisible in chemical reactions but can be divided into physical states. An atom is composed of a nucleus and electrons orbiting the nucleus. Atoms constitute the smallest unit of general matter and are called elements. There are 118 known elements. Therefore, it has a core structure. The following article explains more details about atomic size.
Atomic Size Guide
The size of atoms of elements may be expressed in terms of the atomic radius or ionic radius. In both cases, there is a periodic table trend. The following periodic table shows the relative size of atoms of periodic table elements based on atomic radius data. Each atomic is shown relative to the largest atomic, cesium.
Atom size values are calculated from atomic radius data. This table shows how the atom size and atomic radius values change as you move horizontally and vertically across the periodic table. In general, atomic radius or atom size decreases as you move from left to right. It is due to the way electrons form shells around the nucleus.
Periodic Table Of Elements
Periodic trends are specific patterns in the periodic table that illustrate different aspects of a particular element, including its size and electronic properties. Periodic trends arising from the periodic table arrangement provide chemists with an invaluable tool to quickly predict an element's properties. These trends exist because of the similar atomic structure of the elements within their respective group families or periods and the periodic nature of the elements.
Atomic Radius
An atomic radius is half the distance between adjacent atoms of the same element in a molecule.
Measuring the atomic radii of chemical elements is a complicated task as the size of an atom is of the order of 1.2×10-10 m. The electron cloud forming the shell of an atom does not have any fixed shape, making it difficult to determine the atomic size of an atom. So we can say that practically we cannot determine the size of an individual atom.
Atomic Radius of all the elements
This atomic radius chart gives the Atomic Radius of all the elements of periodic table in pm.
Element Symbol | Element Name | Element Atomic Radius | |
---|---|---|---|
55 | Cs | Cesium | 298 pm |
37 | Rb | Rubidium | 265 pm |
56 | Ba | Barium | 253 pm |
59 | Pr | Praseodymium | 247 pm |
19 | K | Potassium | 243 pm |
62 | Sm | Samarium | 238 pm |
64 | Gd | Gadolinium | 233 pm |
63 | Eu | Europium | 231 pm |
66 | Dy | Dysprosium | 228 pm |
67 | Ho | Holmium | 226 pm |
68 | Er | Erbium | 226 pm |
65 | Tb | Terbium | 225 pm |
69 | Tm | Thulium | 222 pm |
70 | Yb | Ytterbium | 222 pm |
38 | Sr | Strontium | 219 pm |
71 | Lu | Lutetium | 217 pm |
39 | Y | Yttrium | 212 pm |
72 | Hf | Hafnium | 208 pm |
40 | Zr | Zirconium | 206 pm |
60 | Nd | Neodymium | 206 pm |
61 | Pm | Promethium | 205 pm |
73 | Ta | Tantalum | 200 pm |
41 | Nb | Niobium | 198 pm |
57 | La | Lanthanum | 195 pm |
89 | Ac | Actinium | 195 pm |
20 | Ca | Calcium | 194 pm |
74 | W | Tungsten | 193 pm |
11 | Na | Sodium | 190 pm |
42 | Mo | Molybdenum | 190 pm |
75 | Re | Rhenium | 188 pm |
58 | Ce | Cerium | 185 pm |
76 | Os | Osmium | 185 pm |
21 | Sc | Scandium | 184 pm |
43 | Tc | Technetium | 183 pm |
77 | Ir | Iridium | 180 pm |
90 | Th | Thorium | 180 pm |
91 | Pa | Protactinium | 180 pm |
44 | Ru | Ruthenium | 178 pm |
78 | Pt | Platinum | 177 pm |
22 | Ti | Titanium | 176 pm |
92 | U | Uranium | 175 pm |
93 | Np | Neptunium | 175 pm |
94 | Pu | Plutonium | 175 pm |
95 | Am | Americium | 175 pm |
79 | Au | Gold | 174 pm |
45 | Rh | Rhodium | 173 pm |
23 | V | Vanadium | 171 pm |
80 | Hg | Mercury | 171 pm |
46 | Pd | Palladium | 169 pm |
3 | Li | Lithium | 167 pm |
24 | Cr | Chromium | 166 pm |
47 | Ag | Silver | 165 pm |
25 | Mn | Manganese | 161 pm |
48 | Cd | Cadmium | 161 pm |
26 | Fe | Iron | 156 pm |
49 | In | Indium | 156 pm |
81 | Tl | Thallium | 156 pm |
82 | Pb | Lead | 154 pm |
27 | Co | Cobalt | 152 pm |
28 | Ni | Nickel | 149 pm |
12 | Mg | Magnesium | 145 pm |
29 | Cu | Copper | 145 pm |
50 | Sn | Tin | 145 pm |
83 | Bi | Bismuth | 143 pm |
30 | Zn | Zinc | 142 pm |
31 | Ga | Gallium | 136 pm |
84 | Po | Polonium | 135 pm |
51 | Sb | Antimony | 133 pm |
85 | At | Astatine | 127 pm |
32 | Ge | Germanium | 125 pm |
52 | Te | Tellurium | 123 pm |
86 | Rn | Radon | 120 pm |
13 | Al | Aluminium | 118 pm |
53 | I | Iodine | 115 pm |
33 | As | Arsenic | 114 pm |
4 | Be | Beryllium | 112 pm |
14 | Si | Silicon | 111 pm |
54 | Xe | Xenon | 108 pm |
34 | Se | Selenium | 103 pm |
15 | P | Phosphorus | 98 pm |
35 | Br | Bromine | 94 pm |
16 | S | Sulfur | 88 pm |
36 | Kr | Krypton | 88 pm |
5 | B | Boron | 87 pm |
17 | Cl | Chlorine | 79 pm |
18 | Ar | Argon | 71 pm |
6 | C | Carbon | 67 pm |
7 | N | Nitrogen | 56 pm |
1 | H | Hydrogen | 53 pm |
8 | O | Oxygen | 48 pm |
9 | F | Fluorine | 42 pm |
10 | Ne | Neon | 38 pm |
2 | He | Helium | 31 pm |
87 | Fr | Francium | N/A |
88 | Ra | Radium | N/A |
96 | Cm | Curium | N/A |
97 | Bk | Berkelium | N/A |
98 | Cf | Californium | N/A |
99 | Es | Einsteinium | N/A |
100 | Fm | Fermium | N/A |
101 | Md | Mendelevium | N/A |
102 | No | Nobelium | N/A |
103 | Lr | Lawrencium | N/A |
104 | Rf | Rutherfordium | N/A |
105 | Db | Dubnium | N/A |
106 | Sg | Seaborgium | N/A |
107 | Bh | Bohrium | N/A |
108 | Hs | Hassium | N/A |
109 | Mt | Meitnerium | N/A |
110 | Ds | Darmstadtium | N/A |
111 | Rg | Roentgenium | N/A |
112 | Cn | Copernicium | N/A |
113 | Nh | Nihonium | N/A |
114 | Fl | Flerovium | N/A |
115 | Mc | Moscovium | N/A |
116 | Lv | Livermorium | N/A |
117 | Ts | Tennessine | N/A |
118 | Og | Oganesson | N/A |