Question

If Uranium with atomic mass 235 and atomic number 92 decays by emitting two alpha, one beta and two gamma - rays the new daughter element y is:
A. Y with atomic mass 227 and atomic number 88
B. Y with atomic mass 227 and atomic number 89
C. Y with atomic mass 227 and atomic number 90
D. Y with atomic mass 231 and atomic number 89

Explanation:
When we emit an alpha ray from an atom, the atomic mass decreases by 4 and atomic number decreases by 2.
When we emit a beta ray from an atom, the atomic mass remains same and atomic number increases by 1.
When we emit a gamma ray from an atom, both the atomic mass and atomic number remain same.

So Right answer is B.

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Answer 1

Explanation:

Explanation:

When we emit an alpha ray from an atom, the atomic mass decreases by 4 and atomic number decreases by 2.

When we emit a beta ray from an atom, the atomic mass remains same and atomic number increases by 1.

When we emit a gamma ray from an atom, both the atomic mass and atomic number remain same

Answer 2

Answer:

Please post only one question, sorry but it is not proper question