which of the following could have 82 neutrons? w-182 cs-132 ba-138 ta-181
which of the following could have 82 neutrons? w-182 cs-132 ba-138 ta-181
Answer
Explanation:
Step1: Recall neutron - proton relationship
Number of neutrons = Mass number - Atomic number
Step2: Find atomic numbers
W (tungsten) has atomic number 74, Cs (cesium) has atomic number 55, Ba (barium) has atomic number 56, Ta (tantalum) has atomic number 73.
Step3: Calculate neutrons for each
For W - 182: $182−74 = 108$ neutrons. For Cs - 132: $132−55 = 77$ neutrons. For Ba - 138: $138−56 = 82$ neutrons. For Ta - 181: $181−73 = 108$ neutrons.
Answer:
Ba - 138