Question

which of the following is the correct notation for an atom with 35 protons, 44 neutrons and 35 electrons? * (0.5 points) 1 (_{35}^{79}br) 2 (_{79}^{35}br) 3 (_{79}^{197}au) 4 (_{44}^{102}ru)

Explanation:

Step1: Recall atomic - notation rules

The notation for an atom is $_{Z}^{A}X$, where $Z$ is the atomic number (number of protons), $A$ is the mass number (number of protons + neutrons), and $X$ is the chemical symbol.

Step2: Calculate the mass number

Given 35 protons and 44 neutrons. The mass number $A=35 + 44=79$. The atomic number $Z = 35$ (number of protons). The element with atomic number 35 is bromine, symbol $Br$.

Answer:

1. $_{35}^{79}Br$