Answer:
The missing pieces of the nuclear equation are:
Explanation:
1) Given nuclear reaction:
[tex]^9_4Be+^1_1H->^A_ZX+^4_2He[/tex]
2) A: mass number:
Balance the mass numbers of both sides of the nuclear reaction.
The mass number is the superscript to the left of the chemical symbol:
3) Z: atomic number
Balance the atomic numbers of both sides of the nuclear reaction
The atomic number is the subscript to the left of the chemical symbol:
4) Identity of the element.
The atomic number, which is the number of protons, identifies the unknown element: X.
You can find this information in a periodic table.
The element with atomic number 3 is lithium, and its chemical symbol is Li, hence X = Li.