consider the nuclear equation below.\n$_{86}^{222}rn\\longrightarrow_{?}^{218}po + _{2}^{4}he$\nwhich is the…

consider the nuclear equation below.\n$_{86}^{222}rn\\longrightarrow_{?}^{218}po + _{2}^{4}he$\nwhich is the missing value that will balance the equation?\n84\n86\n88\n90

consider the nuclear equation below.\n$_{86}^{222}rn\\longrightarrow_{?}^{218}po + _{2}^{4}he$\nwhich is the missing value that will balance the equation?\n84\n86\n88\n90

Answer

Explanation:

Step1: Recall nuclear - equation balance rule

In a nuclear equation, the sum of atomic numbers on the left - hand side must equal the sum of atomic numbers on the right - hand side. The atomic number of $^{222}{86}Rn$ is 86. The atomic number of $^{4}{2}He$ is 2. Let the atomic number of $^{218}_{?}Po$ be $x$.

Step2: Set up the equation

We have the equation $86=x + 2$.

Step3: Solve for $x$

Subtract 2 from both sides of the equation: $x=86 - 2=84$.

Answer:

A. 84