Chemistry
Grade-8
Easy
Question
The atomic mass of oxygen atom is:
- 12
- 14
- 16
- 8
Hint:
Atomic mass is the double atomic number.
The correct answer is: 16
- Oxygen is a chemical element with the symbol O. It has the atomic number 8. Atomic mass is related to the number of neutrons and protons present in a particular nucleus of an element.
- The atomic number is usually the number of protons present in the nucleus of an element. The average weight of the is the total number of protons in the nucleus.
- Number of electrons=number of protons= number of neutrons=8
- Atomic mass is the number of protons+ number of neutrons= 8+8=16
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