Answer
Missing atom: $^{243}_{97}Bk$
Complete equation:
$^4_2He + ^{241}_{95}Am --\gt ^{243}_{97}Bk + 2_0^1n$
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.
$4 + 241 = ? + (2*1)$
$245 = ? + 2$
$245 - 2 = ?$
$243 = ?$
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.
$2 + 95 = ? + 0$
$97 = ?$
3. Identify the symbol of the element with atomic number equal to 97 (Use a periodic table):
- It is "Bk".
4. Write the symbol with the atomic and mass numbers, and write the complete nuclear equation:
$^{243}_{97}Bk$
$^4_2He + ^{241}_{95}Am --\gt ^{243}_{97}Bk + 2_0^1n$