Question

bromine is the only nonmetal that is a liquid at room temperature. consider the isotope bromine - 81, ₃₅br. select the combination which lists the correct atomic number, number of neutrons, and mass number, respectively. o 35, 46, 81 o 35, 81, 46 o 81, 46, 35 o 46, 81, 35 o 35, 81, 116

Explanation:

Step1: Recall atomic number concept

Atomic number is unique for an element. Bromine (Br) has an atomic number of 35.

Step2: Recall mass - number concept

For bromine - 81 isotope, the mass number is 81.

Step3: Calculate neutron number

Neutron number = Mass number - Atomic number. So, for bromine - 81, neutron number = 81 - 35=46.

Answer:

35, 46, 81