General Science - Physics (Basics)
An atom has 12 protons and 12 neutrons. What is its mass number?
An atom has 12 protons and 12 neutrons. What is its mass number?
easy Q13 of 15
Step-by-Step Solution
Step 1: Recall mass number definition
Mass number is the sum of protons and neutrons in the nucleus.Step 2: Calculate mass number
Mass number = 12 (protons) + 12 (neutrons) = 24.Final Answer:
24 → Option BQuick Check:
Mass number = Protons + Neutrons = 24 ✅
Quick Trick: Mass number = protons + neutrons.
Common Mistakes:
- Confusing mass number with atomic number or neutron count.
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