❝ ɴᴀᴍᴇ :
➠ three elements that have a single electron in their outermost shells.
➠ two elements that have two electrons in their outermost shells.
➠ three elements with filled outermost shells.
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Answered by
9
Lithium,Sodium,Potassium
(b) Magnesium,Calcium.
(c) Helium, Neon, Argon.
Answered by
18
Answer:
➠(1)Lithium, Sodium, and Potassium
➠(2)Magnesium and Calcium
➠(3)Helium (He), neon (Ne) and argon (Ar)
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