Question

identify the following elements by the valence electron configuration below:
$2s^1$
$3d^64s^2$
$3d^{10}4s^2$
$2s^22p^5$
$6s^2$
$4d^{10}5s^25p^2$
$3s^23p^5$
$4d^{10}5s^25p^3$

Explanation:

Step1: Match $2s^1$ to element

Valence electrons: 1, period 2, group 1 → Lithium (Li)

Step2: Match $3d^64s^2$ to element

Valence electrons: 8, period 4, group 8 → Iron (Fe)

Step3: Match $3d^{10}4s^2$ to element

Valence electrons: 12, period 4, group 12 → Zinc (Zn)

Step4: Match $2s^22p^5$ to element

Valence electrons: 7, period 2, group 17 → Fluorine (F)

Step5: Match $6s^2$ to element

Valence electrons: 2, period 6, group 2 → Barium (Ba)

Step6: Match $4d^{10}5s^25p^2$ to element

Valence electrons: 4, period 5, group 14 → Tin (Sn)

Step7: Match $3s^23p^5$ to element

Valence electrons: 7, period 3, group 17 → Chlorine (Cl)

Step8: Match $4d^{10}5s^25p^3$ to element

Valence electrons: 5, period 5, group 15 → Antimony (Sb)

Answer:

$2s^1$: Lithium (Li)
$3d^64s^2$: Iron (Fe)
$3d^{10}4s^2$: Zinc (Zn)
$2s^22p^5$: Fluorine (F)
$6s^2$: Barium (Ba)
$4d^{10}5s^25p^2$: Tin (Sn)
$3s^23p^5$: Chlorine (Cl)
$4d^{10}5s^25p^3$: Antimony (Sb)