Question

a-particles are projected towards the
energy. Towards which metal, the
distance of closest approach is minimum?
1) Cu(Z = 29) 2) Ag (Z = 47
3) Au(Z = 79) 4 Ca(Z = 20)
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Answer 1

Answer:

4 . Ca

Explanation:

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Answer 2

Answer:

Ca is the answer.

Explanation:

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