Physics, asked by Tulsirani100, 11 months ago

86Rn290---------->84X286 +alpha particle

Which element is X?

Answers

Answered by PrincessManshi

0

86Rn290——-) 84x286 +2He4

X is Radium.

There’s no particular way to know this, u just got to get little knowledge of periodic table

Answered by renuhkkohli693

1

Explanation:

X is a radium

pls Mark me as Brainliest

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