12
Question
Nobel gases were included in Mendeleev's periodic table in the:
Nobel gases were included in Mendeleev's periodic table in the:
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Solution
The correct option is D none of these
Mendeleev's Periodic Table:
Elements are arranged in the periodic table in the increasing order of their relative atomic masses.
Mendeleev divided his periodic table into eight groups and seven periods.
Groups from I to VII are meant for normal elements and group VIII is for transition elements.
Groups from I to VII have been divided into two subgroups, while group VIII is meant for three elements.
Periods from 4th to 7th have been divided into two series: 1st series and 2nd series.
Elements having similar properties have been kept in the same group. For example; lithium, potassium, rubidium, etc. are in the 1st group.
Mendeleev's Periodic Table:
Elements are arranged in the periodic table in the increasing order of their relative atomic masses.
Mendeleev divided his periodic table into eight groups and seven periods.
Groups from I to VII are meant for normal elements and group VIII is for transition elements.
Groups from I to VII are meant for normal elements and group VIII is for transition elements.
Groups from I to VII have been divided into two subgroups, while group VIII is meant for three elements.
Periods from 4th to 7th have been divided into two series: 1st series and 2nd series.
Elements having similar properties have been kept in the same group. For example; lithium, potassium, rubidium, etc. are in the 1st group.
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