What is the mass number of beryllium?
Understand the Problem
The question is asking for the mass number of beryllium, which refers to the total number of protons and neutrons in the nucleus of a beryllium atom. This is a straightforward knowledge-based inquiry.
Answer
9
The final answer is 9
Answer for screen readers
The final answer is 9
More Information
The mass number of beryllium is 9. This refers to the number of protons and neutrons in the nucleus (4 protons and 5 neutrons).
Tips
A common mistake is confusing atomic mass with mass number. Atomic mass includes weighted averages based on isotopic distribution, while mass number is a whole number.
Sources
- Beryllium - Element information, properties and uses | Periodic Table - rsc.org
- Beryllium - ciaaw.org
- Beryllium - Wikipedia - en.wikipedia.org
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