Predict the maximum number of valence electro | vedclass

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Question

(B) The first period of the periodic table consists of only two elements: Hydrogen $(H)$ and Helium $(He)$.Hydrogen has an atomic number of $1$,with a

Vedclass · Accepted Answer

$2$

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(B) The first period of the periodic table consists of only two elements: Hydrogen $(H)$ and Helium $(He)$.Hydrogen has an atomic number of $1$,with an electronic configuration of $1s^1$,meaning it has $1$ valence electron.Helium has an atomic number of $2$,with an electronic configuration of $1s^2$,meaning it has $2$ valence electrons.Since the first shell ($K$-shell) can hold a maximum of $2$ electrons,the maximum number of valence electrons for any atom in the first period is $2$.

Predict the maximum number of valence electrons possible for atoms in the first period of the periodic table.

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