Complete the nuclear equation...(Please someone teach me how to solve this-what is the procedure to solve this

Question

253 4 1

99 Es 2He ----> 0n ?

Answer choices:

1. ? = 252

103Md

2. ? = 254

102Bk

3. ? = 249

97Bk

4. ? = 256

101Md

5. None of these

6. ? = 248

105Es

7. ? = 257

101Es

Answer 1

99Es253 + 2He4 ===> n + 101Md256

Answer 4. You have to develop a better way to denote atomic numbers and mass numbers of nuclei and nucleons. The mass numbers addup on both sides. The atomic numbers (protons add up on both sides.