(N/A) PeriodFirst Element $(Name/Symbol, Z)$ and Last Element $(Name/Symbol, Z)$$1$$Hydrogen (H), 1$; $Helium (He), 2$$2$$Lithium (Li), 3$; $Neon (Ne)

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(N/A) PeriodFirst Element $(Name/Symbol, Z)$ and Last Element $(Name/Symbol, Z)$$1$$Hydrogen (H), 1$; $Helium (He), 2$$2$$Lithium (Li), 3$; $Neon (Ne), 10$$3$$Sodium (Na), 11$; $Argon (Ar), 18$$4$$Potassium (K), 19$; $Krypton (Kr), 36$$5$$Rubidium (Rb), 37$; $Xenon (Xe), 54$$6$$Cesium (Cs), 55$; $Radon (Rn), 86$$7$$Francium (Fr), 87$; $Oganesson (Og), 118$

Class 11 Chemistry Classification of Elements and Periodicity in Properties Extended or long form of periodic table

Medium

Provide the name,symbol,and atomic number of the first and last elements for each period from $1$ to $7$ of the periodic table.

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Solution

(N/A)

Period	First Element $(Name/Symbol, Z)$ and Last Element $(Name/Symbol, Z)$
$1$	$Hydrogen (H), 1$; $Helium (He), 2$
$2$	$Lithium (Li), 3$; $Neon (Ne), 10$
$3$	$Sodium (Na), 11$; $Argon (Ar), 18$
$4$	$Potassium (K), 19$; $Krypton (Kr), 36$
$5$	$Rubidium (Rb), 37$; $Xenon (Xe), 54$
$6$	$Cesium (Cs), 55$; $Radon (Rn), 86$
$7$	$Francium (Fr), 87$; $Oganesson (Og), 118$