
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)
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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:
- Blocks in Periodic Table
- Groups in Periodic Table
- Metals in Periodic Table
- Alkali Metals in Periodic Table
- Alkaline Earth Metals in Periodic Table
- Lanthanides in Periodic Table
- Actinides in Periodic Table
- Transition Metals in Periodic Table
- Post Transition Metals in Periodic Table
- Metalloids in Periodic Table
- Nonmetals in Periodic Table
- Reactive Nonmetals in Periodic Table
- Noble Gases in Periodic Table