According to IUPAC, how many total numbers of groups and periods in the periodic table respectively are

Question

Answer

18 groups & 7 periods

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18 ģŕõùpś & 7 pèŕìòďś

Answer

.
Groups = 1⃣8⃣

period = 7⃣

😊😊😊😊😊

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1️⃣8️⃣ grp and 7️⃣ prd resp...

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Mendeleef

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according to IUPAC there are 7periods and 18 groups

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18 groups and 7periods

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18 groups 7 periods

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According to modern form of periodic table which is approved by IUPAC. there is total 18 groups and 7 period in the periodic table

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18 groups and 7 periods

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7 periods and 18 groups

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Don't ask so basic question, who ever has little bit knowledge about chemistry would know

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According to IUPAC, the International Union of Pure and Applied Chemistry, the periodic table is organized into groups and periods. Let's explore the number of groups and periods in the periodic table in detail.

Groups in the Periodic Table:
- The groups in the periodic table are the vertical columns that divide the elements based on similar chemical properties.
- Each group is identified by a specific number and sometimes by a unique name or symbol.
- The number of groups in the periodic table can vary depending on the classification system used. The most commonly used classification system is the 'long form' or 'CAS (Chemical Abstracts Service) system,' which consists of 18 groups.
- However, there are alternative classification systems that include fewer groups. For example, the 'short form' or 'European system' categorizes the elements into 8 groups.
- In summary, the number of groups in the periodic table can be 18 (long form) or 8 (short form), depending on the classification system used.

Periods in the Periodic Table:
- The periods in the periodic table are the horizontal rows that represent the elements arranged in order of increasing atomic number.
- Each period starts with an alkali metal and ends with a noble gas.
- The number of periods in the periodic table is determined by the highest energy level (principal quantum number) occupied by the elements in a given period.
- The maximum number of electrons that can be accommodated in a period corresponds to 2n^2, where n is the period number.
- For example, the first period (n=1) can accommodate a maximum of 2(1)^2 = 2 electrons, the second period (n=2) can accommodate a maximum of 2(2)^2 = 8 electrons, and so on.
- As a result, the periodic table currently has seven periods, ranging from the first period (with only two elements, hydrogen and helium) to the seventh period (with 32 elements).
- It is important to note that period 7 is not complete in the current periodic table, as elements beyond atomic number 118 have been synthesized but have not yet been officially named.

In conclusion, according to IUPAC, the number of groups in the periodic table can be either 18 (long form) or 8 (short form), depending on the classification system used. The periodic table consists of seven periods, representing the elements arranged in order of increasing atomic number.

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