
In chemistry, a period is a horizontal row of elements in the periodic table. From top to bottom, there are a total of 7 periods in the periodic table. A combination of 7 periods in the periodic table makes a total of 118 known elements. (period 1: 2 elements, period 2: 8 elements, period 3: 8 elements, period 4: 18 elements, period 5: 18 elements, period 6: 32 elements, and period 7: 32 elements)
group | ⇨ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
period | ⇩ | ||||||||||||||||||
1 | 1 H ![]() Hydrogen |
2 He ![]() Helium |
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2 | 3 Li ![]() Lithium |
4 Be ![]() Beryllium |
5 B ![]() Boron |
6 C ![]() Carbon |
7 N ![]() Nitrogen |
8 O ![]() Oxygen |
9 F ![]() Fluorine |
10 Ne ![]() Neon |
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3 | 11 Na ![]() Sodium |
12 Mg ![]() Magnesium |
13 Al ![]() Aluminium |
14 Si ![]() Silicon |
15 P ![]() Phosphorus |
16 S ![]() Sulfur |
17 Cl ![]() Chlorine |
18 Ar ![]() Argon |
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4 | 19 K ![]() Potassium |
20 Ca ![]() Calcium |
21 Sc ![]() Scandium |
22 Ti ![]() Titanium |
23 V ![]() Vanadium |
24 Cr ![]() Chromium |
25 Mn ![]() Manganese |
26 Fe ![]() Iron |
27 Co ![]() Cobalt |
28 Ni ![]() Nickel |
29 Cu ![]() Copper |
30 Zn ![]() Zinc |
31 Ga ![]() Gallium |
32 Ge ![]() Germanium |
33 As ![]() Arsenic |
34 Se ![]() Selenium |
35 Br ![]() Bromine |
36 Kr ![]() Krypton |
|
5 | 37 Rb ![]() Rubidium |
38 Sr ![]() Strontium |
39 Y ![]() Yttrium |
40 Zr ![]() Zirconium |
41 Nb ![]() Niobium |
42 Mo ![]() Molybdenum |
43 Tc ![]() Technetium |
44 Ru ![]() Ruthenium |
45 Rh ![]() Rhodium |
46 Pd ![]() Palladium |
47 Ag ![]() Silver |
48 Cd ![]() Cadmium |
49 In ![]() Indium |
50 Sn ![]() Tin |
51 Sb ![]() Antimony |
52 Te ![]() Tellurium |
53 I ![]() Iodine |
54 Xe ![]() Xenon |
|
6 | 55 Cs ![]() Caesium |
56 Ba ![]() Barium |
72 Hf ![]() Hafnium |
73 Ta ![]() Tantalum |
74 W ![]() Tungsten |
75 Re ![]() Rhenium |
76 Os ![]() Osmium |
77 Ir ![]() Iridium |
78 Pt ![]() Platinum |
79 Au ![]() Gold |
80 Hg ![]() Mercury |
81 Tl ![]() Thallium |
82 Pb ![]() Lead |
83 Bi ![]() Bismuth |
84 Po ![]() Polonium |
85 At ![]() Astatine |
86 Rn ![]() Radon |
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7 | 87 Fr ![]() Francium |
88 Ra ![]() Radium |
104 Rf ![]() Rutherfordium |
105 Db ![]() Dubnium |
106 Sg ![]() Seaborgium |
107 Bh ![]() Bohrium |
108 Hs ![]() Hassium |
109 Mt ![]() Meitnerium |
110 Ds ![]() Darmstadtium |
111 Rg ![]() Roentgenium |
112 Cn ![]() Copernicium |
113 Nh ![]() Nihonium |
114 Fl ![]() Flerovium |
115 Mc ![]() Moscovium |
116 Lv ![]() Livermorium |
117 Ts ![]() Tennessine |
118 Og ![]() Oganesson |
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57 La ![]() Lanthanum |
58 Ce ![]() Cerium |
59 Pr ![]() Praseodymium |
60 Nd ![]() Neodymium |
61 Pm ![]() Promethium |
62 Sm ![]() Samarium |
63 Eu ![]() Europium |
64 Gd ![]() Gadolinium |
65 Tb ![]() Terbium |
66 Dy ![]() Dysprosium |
67 Ho ![]() Holmium |
68 Er ![]() Erbium |
69 Tm ![]() Thulium |
70 Yb ![]() Ytterbium |
71 Lu ![]() Lutetium |
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89 Ac ![]() Actinium |
90 Th ![]() Thorium |
91 Pa ![]() Protactinium |
92 U ![]() Uranium |
93 Np ![]() Neptunium |
94 Pu ![]() Plutonium |
95 Am ![]() Americium |
96 Cm ![]() Curium |
97 Bk ![]() Berkelium |
98 Cf ![]() Californium |
99 Es ![]() Einsteinium |
100 Fm ![]() Fermium |
101 Md ![]() Mendelevium |
102 No ![]() Nobelium |
103 Lr ![]() Lawrencium |
1 | – period 1 element | 5 | – period 5 element |
2 | – period 2 element | 6 | – period 6 element |
3 | – period 3 element | 7 | – period 7 element |
4 | – period 4 element |
FAQs on Period (Periodic Table)
‣ What is the period for helium? The helium is in period 1 (first row) of the periodic table. |
‣ What is period 7 on the periodic table? Period 7 is the seventh row of the periodic table that includes the chemical elements from francium to oganesson. |
‣ How many elements are there in 7th period? There are a total of 32 chemical elements in the 7th period of the periodic table. |
‣ Which element in period 3 on the periodic table is a metalloid? The silicon element located in period 3 of the periodic table is a metalloid. |
‣ What is period 4 on the periodic table? Period 4 is the fourth row of the periodic table that includes the chemical elements from potassium to krypton. |
‣ What is period 2 on the periodic table? Period 2 is the second row of the periodic table that includes the chemical elements from lithium to neon. |
‣ What is period 5 on the periodic table? Period 5 is the fifth row of the periodic table that includes the chemical elements from rubidium to xenon. |
‣ What are the period names on the periodic table? The period names on the periodic table are as follows: Period 1: includes elements hydrogen (H) and helium (He) Period 2: includes elements from lithium (Li) to neon (Ne) Period 3: includes elements from sodium (Na) to argon (Ar) Period 4: includes elements from potassium (K) to krypton (Kr) Period 5: includes elements from rubidium (Rb) to xenon (Xe) Period 6: includes elements from caesium (Cs) to radon (Rn) Period 7: includes elements from francium (Fr) to oganesson (Og) |
‣ How many halogens are in period 3 of the periodic table? The chlorine element located in period 3 of the periodic table is a halogen. |
‣ How many metals are in second period of periodic table? The lithium element and beryllium element are two metals located in the second period of the periodic table. |
‣ How many group 17 elements are in period 3 of the periodic table? The chlorine (Cl) located in period 3 of the periodic table is a group 17 element. |
‣ How many elements are there in 6th period of periodic table? There are a total of 32 chemical elements in the 6th period of the periodic table. |
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Related:
Also Read:
- Block
- Group
- Metal
- Alkali Metal
- Alkaline Earth Metal
- Lanthanide
- Actinide
- Transition Metal
- Post Transition Metal
- Metalloids in Periodic Table
- Nonmetals in Periodic Table
- Reactive Nonmetal
- Noble Gas
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