Multiple choice general knowledge science & technology

What is the atomic Weight of oxygen?

  1. 8

  2. 16

  3. 7

  4. 6
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oxygen has an atomic mass of approximately 16 atomic mass units (amu). The atomic number of oxygen is 8, but the atomic weight (mass) is 16 because oxygen-16 is its most abundant isotope. Option A confuses atomic number with atomic mass.

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