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Subjects
Science Test Space
Class 10
Periodic Classifications of elements
The modern periodic law
3.
Match the followings: Features of Periods
Question:
4
m.
Match the following:
Question
Answer
\(1\)st period contains
three elements
four elements
two elements
five elements
\(2\)nd period contains
\(9\) elements
five elements
\(10\) elements
\(8\) elements
\(3\)rd period elements
Sodium to Xenon
Xenon to Sodium
Sodium to Argon
Helium to Rubidium
Fourth period
Atomic number \(12\) to \(28\)
Atomic numbers \(19\) to \(36\)
Atomic numbers \(19\) to \(39\)
Atomic numbers \(20\) to \(36\)
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