Answer
Missing atom: $^{76}_{35}Br$
Complete equation:
$^0_{-1}e + ^{76}_{36}Kr -- \gt ^{76}_{35}Br$
Work Step by Step
1. Calculate the mass number of the missing atom.
- The sum of the mass numbers on the right side must be equal to that on the left side.
$0 + 76 = ?$
$76 = ?$
2. Calculate the atomic number of the missing atom.
- The sum of the atomic numbers on the right side must be equal to that on the left side.
$-1 + 36 = ?$
$36 - 1 = ?$
$35 = ?$
3. Identify the symbol of the element with atomic number equal to 35 (Use a periodic table):
- It is "Br".
4. Write the symbol with the atomic and mass numbers, and write the complete nuclear equation:
$^{76}_{35}Br$
$^0_{-1}e + ^{76}_{36}Kr -- \gt ^{76}_{35}Br$
