Question

1. how many protons, electrons, and neutrons does a neutral atom with atomic number 50 and mass number 125 contain?

a) 50 protons, 50 electrons, 75 neutrons
b) 75 electrons, 50 protons, 50 neutrons
c) 120 neutrons, 50 protons, 75 electrons
d) 70 neutrons, 75 protons, 50 electrons

Explanation:

Determine protons and electrons from atomic number

$$
LATEXBLOCK0
$$

Calculate neutrons from mass number

$$
LATEXBLOCK1
$$

Match with the correct option

$$ \text{Result: } 50 \text{ protons}, 50 \text{ electrons}, 75 \text{ neutrons} \implies \text{Option A} $$

Answer:

• A) 50 protons, 50 electrons, 75 neutrons (Correct answer)
• B) 75 electrons, 50 protons, 50 neutrons
• C) 120 neutrons, 50 protons, 75 electrons
• D) 70 neutrons, 75 protons, 50 electrons