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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 elements
Hydrogen and Helium
Hydrogen and Hydrogen
Helium and Helium
Helium to Sodium
\(2nd\) period elements
Sodium to Neon
Argon to Neon
Helium to Sodium
Lithium to Neon
\(3\)rd period contains
nine elements
ten elements
nineteen elements
eight elements
\(4\)th period elements
Sodium to Argon
Lithium to Neon
Potassium to Krypton
Helium to Rubidium
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