Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
Medium$(a)$ Name the element with atomic number $17$.
$(b)$ To which period does it belong?
$(c)$ To which group does it belong?
$(d)$ Write its electronic configuration.
$(b)$ To which period does it belong?
$(c)$ To which group does it belong?
$(d)$ Write its electronic configuration.
(A) The element with atomic number $17$ is Chlorine $(Cl)$.
$(b)$ It belongs to the $3rd$ period because it has $3$ electron shells $(K, L, M)$.
$(c)$ It belongs to group $17$ (Halogens) because it has $7$ valence electrons.
$(d)$ The electronic configuration is $2, 8, 7$.
$(b)$ It belongs to the $3rd$ period because it has $3$ electron shells $(K, L, M)$.
$(c)$ It belongs to group $17$ (Halogens) because it has $7$ valence electrons.
$(d)$ The electronic configuration is $2, 8, 7$.
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