Find the unknown atomic number and mass number respectively, for the following reaction
A) 141, 53
B) 140, 54
C) 53, 41
D) 54, 140
E) 54, 141

Question

Find the unknown atomic number and mass number respectively, for the following reaction 
A) 141, 53 
B) 140, 54 
C) 53, 41 
D) 54, 140 
E) 54, 141

Quizplus · Accepted Answer

The atomic number of the element is given by the subscript in the chemical symbol, which is 54 in this case (Xe). The mass number is given by the sum of the protons and neutrons, which can be calculated by subtracting the atomic number from the mass number given in the reaction: 194 - 54 = 140. Therefore, the correct answer is D) 54, 140.

Find the Unknown Atomic Number and Mass Number Respectively, for the Following