225/88ra arrow 0/-1e+ blank/89 ac

Question

The missing box would be the number and this is a form of decay.

Blank 1:
Blank 2:

Answer 1

To fill in the blanks for the given nuclear notation "225/88 Ra → 0/-1 e + 89 Ac," we can break it down:

1. Identify the missing number (Blank 1):

   • The missing number usually represents the atomic mass of the product. Here, you have Radium-225 (Ra) decaying into an isotope of Actinium (Ac), which is noted as having an atomic number of 89. Therefore:
     • The atomic mass of the Actinium product can be found by subtracting the mass of the emitted electron (0 for the atomic mass).
     • The atomic mass of Ra (225) is preserved in the decay process; thus, the mass of the product will also be 225.

   Therefore, Blank 1: 225.

2. Identify the form of decay (Blank 2):

   • Since an electron (beta particle) is being emitted, this is a case of beta decay, specifically beta minus decay (β^- decay).

Therefore, Blank 2: beta decay.

Putting it all together:

Blank 1: 225
Blank 2: beta decay