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A)berylium b)sodium c)neon d)oxygen e)selenium

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Answer:

a) Beryllium: [He] 2s2

b) Sodium: [Ne] 3s1

c) Neon: [He] 2s2 2p6

d) Oxygen: [He] 2s2 2p4

e) Selenium: [Ar] 3d10 4s2 4p4

Step-by-step explanation:

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