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Subjects
Science State Board
Class 10
Periodic Classifications of elements
The modern periodic law
3.
Match the followings: Features of Periods
Exercise condition:
4
m.
Match the following:
Question
Answer
\(1\)st period contains
three elements
five elements
two elements
four elements
\(2nd\) period elements
Helium to Rubidium
Argon to Neon
Sodium to Neon
Lithium to Neon
\(3\)rd period elements
Sodium to Xenon
Xenon to Argon
Xenon to Sodium
Sodium to Argon
\(4\)th period elements
Xenon to Argon
Lithium to Neon
Potassium to Krypton
Sodium to Argon
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