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Identify the outer electron configurations for the (a) alkali metals, (b) alkaline earth metals, (c) halogens, (d) noble gases.

(a) Alkali metal ns1 ns2 ns2np1 ns2np2 ns2np3 ns2np4 ns2np5 ns2np6

(b) Alkaline earth metals ns1 ns2 ns2np1 ns2np2 ns2np3 ns2np4 ns2np5 ns2np6

(c) Halogens ns1 ns2 ns2np1 ns2np2 ns2np3 ns2np4 ns2np5 ns2np6

(d) Noble gases ns1 ns2 ns2np1 ns2np2 ns2np3 ns2np4 ns2np5 ns2np6

Respuesta :

ayfat23

Answer:

A)ns¹

B)ns²

C)ns² np⁵

D)ns² np⁶

Explanation;

A) Alkaline metals are found in group 1A of periodic table with outer electron configuration ( ns¹)

Li = 1s

Na =3s

K. = 4s

Rb. = 5s

Cs =6s

Fr. =7s

n symbolize the main energy level: 1, 2, 3, 4, 5, 6,7.

B)Alkaline Earth metals are found in group 2A of periodic table with outer electron configuration ( ns²)

Be. =2s2

Mg. =3s2

Ca. = 4s2

Sr:. = 5s2

Ba: =6s2

Ra:. =7s2

n symbolize the main energy level: 1, 2, 3, 4, 5, 6,7.

C)The Halogens are found in group 1A of periodic table with outer electron configuration ( ns² np⁵ )

F: =2s2 2p5

Cl: = 3s2 3p5

Br: = 4s2 4p5

I: =5s2 5p5

n symbolize the main energy level: 1, 2, 3, 4, 5, 6,7.

D)The Noble gsas are found in group 1A of periodic table with outer electron configuration ( ns² np⁶ )

=> He: 1s2

Ne = 2s2 2p6

Ar = 3s2 3p6

Kr = 4s2 4p6

Xe = 5s2 5p6

Rn = 6s2 6p6

n symbolize the main energy level: 1, 2, 3, 4, 5, 6,7.

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