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

Answer:

84

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.

Answer 2

Answer:

A) 84

Explanation:

I just did the review.