How many groups and periods are there in periodic table? Name them
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There are 18 groups and 7 periods
The following names for specific groups in the periodic table are in common use:
Group 1: alkali metals.
Group 2: alkaline earth metals.
Group 11: coinage metals (not an IUPAC approved name)
Group 15: pnictogens (not an IUPAC approved name)
Group 16: chalcogens.
Group 17: halogens.
Group 18: noble gases.
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Answer:
18 groups and 7 periods
Explanation:
The atomic size and metallic character increase down a group
The atomic size and metallic character decrease from left to right in a period
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