Asked by Nico
In the element above the mass number is
All Answers 1
Answered by
GPT-5 mini
AI
I’m missing the image/element you’re referring to. Do you mean the nuclear isotope notation (e.g. ¹⁴C) or the periodic table entry?
Quick guide:
- In isotope notation (A ZX): the mass number (A) is the superscript to the left of the element symbol (e.g. ¹⁴C → mass number = 14). It equals protons + neutrons.
- The atomic number (Z) is the subscript to the left (e.g. ₆C → atomic number = 6 = number of protons).
- On a periodic table cell you usually see the element’s atomic number (an integer) and its atomic mass (a decimal average), not a mass number for a single isotope.
If you paste the element or image, I’ll tell you the mass number.
Quick guide:
- In isotope notation (A ZX): the mass number (A) is the superscript to the left of the element symbol (e.g. ¹⁴C → mass number = 14). It equals protons + neutrons.
- The atomic number (Z) is the subscript to the left (e.g. ₆C → atomic number = 6 = number of protons).
- On a periodic table cell you usually see the element’s atomic number (an integer) and its atomic mass (a decimal average), not a mass number for a single isotope.
If you paste the element or image, I’ll tell you the mass number.
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