Chemistry · Structure of the Atom
Identify elements A and B based on the number of protons and neutrons provided: Element A: 20 protons and 20 neutrons Element B: 19 protons and 20 neutrons
- 1A: Calcium, B: Magnesium
- 2A: Potassium, B: Calcium
- 3A: Magnesium, B: Potassium
- 4A: Calcium, B: Potassium✓
Correct answer
A: Calcium, B: Potassium
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