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Biraha Kooxda 1 iyo 2 — Imtixaanka bilowga
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Dooro mid
Waa maxay koox (group) ee jaantuska xilliyeedka (periodic table)?
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Ii akhri
a
Saf elementyo ah oo leh tirada isku midka ah ee qolalka elektaroonka (electron shells).
b
Tiir elementyo ah oo leh tirada isku midka ah ee elektaroonnada ku jira qolalka sare (outer shell).
c
Saf elementyo ah oo loo habeeyay tirada atomiga (atomic number) ee sii kordhaysa.
d
Tiir elementyo ah oo leh tirada isku midka ah ee borotoonnada (protons).
Hubi
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