Question

Consider the nuclear equation below. 222/66Rn-->218/?Po+4/2He Which is the missing value that will balance the equation? 84 86 88 90

Answer 1

A) 84

Step-by-step explanation:

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Answer 2

84

Step-by-step explanation:

• The nuclear equation shows the decay of Radon-222 by emitting an alpha particle to form polonium-218.
• When a radioactive isotope undergoes alpha-decay, the mass number is decreased by 4 while the atomic number decreases by 2.
• Therefore, the complete nuclear equation is;

²²²₈₆Rn → ²¹⁸₈₄Po + ⁴₂He

• The atomic number of Radon-222 decreases from 86 to 84 while the mass number decreases from 222 to 218, forming polonium-218.