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Byju's Answer
Standard VII
Chemistry
Sub-Atomic Particles
90Th, a membe...
Question
90
Th
, a member of
I
I
I
group of Mendeleev's periodic table on losing
α
-particles forms a new element belonging to:
A
I
group
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B
I
I
I
group
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C
I
I
group
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D
I
V
group
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Solution
The correct option is
D
I
I
group
90
Th
a member of
I
I
I
group of Mendeleev's periodic table on losing
α
-particles forms a new element belonging to
I
I
group.
232
90
Th
⟶
228
88
Ra
+
4
2
He
Elements 89 to 103 are placed in
I
I
I
group.
Hence, option C is correct.
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