Symbols `""_(35)^(79)Br and ""^(79)Br` can be written, whereas symbols `""_(79)^(35)Br and ""^(35)Br` are not acceptable. Answer briefly.

Explanation

To understand why the symbols \( _{35}^{79}\text{Br} \) and \( ^{79}\text{Br} \) are acceptable while \( _{79}^{35}\text{Br} \) and \( ^{35}\text{Br} \) are not, we need to look at the conventions for writing atomic symbols.

### Step-by-Step Solution:

1. **Identify the Components of the Symbols**:
- Each symbol consists of three parts: the element symbol (in this case, Br for bromine), the atomic number (Z), and the mass number (A).
- The atomic number (Z) represents the number of protons in the nucleus of the atom.
- The mass number (A) represents the total number of protons and neutrons in the nucleus.
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