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Science CBSE Homework Assignments
Class 9
Structure of the atom
Valency
1.
Gain and loss of electron(s)
Question:
2
m.
Choose the correct answer based on the reaction given.
1
.
The given reaction shows
negative ion formation
positive ion formation
anion formation
.
Na
⟶
Na
+
+
1e
−
2
.
The below reaction shows
cation formation
negative ion formation
positive ion formation
.
S
+
2e
−
⟶
S
2
−
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