Mass number equals the sum of which particles?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the Chemistry CFE Test with our comprehensive quiz. Study using flashcards and multiple choice questions, each supplemented by hints and explanations. Get ready to excel!

Multiple Choice

Mass number equals the sum of which particles?

Explanation:
Mass number is the total count of particles in the nucleus—the protons plus the neutrons. It captures how many nucleons the nucleus contains, and electrons don’t contribute to this count because they reside outside the nucleus and have negligible mass compared to nucleons. So, the mass number equals protons plus neutrons. For example, carbon-12 has 6 protons and 6 neutrons, giving a mass number of 12. Hydrogen-1 has 1 proton and 0 neutrons, giving a mass number of 1. The other options mix in electrons or use a non-mass operation, which isn’t how mass number is defined.

Mass number is the total count of particles in the nucleus—the protons plus the neutrons. It captures how many nucleons the nucleus contains, and electrons don’t contribute to this count because they reside outside the nucleus and have negligible mass compared to nucleons. So, the mass number equals protons plus neutrons. For example, carbon-12 has 6 protons and 6 neutrons, giving a mass number of 12. Hydrogen-1 has 1 proton and 0 neutrons, giving a mass number of 1. The other options mix in electrons or use a non-mass operation, which isn’t how mass number is defined.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy