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Since you want atomic (rather than molecular) anions AND 9 protons only the element with atomic number 9 is possible, i.e. Fluorine. This has really only one anionic state though, -1. So I can only suppose you mean either:
- transient unstable anions
- synthetic isotopes of Fluorine (also unstable)
- molecular rather than atomic anions
In the latter case (most likely) you could have as well as F- also e.g. NH2- or OH- as molecular (not atomic) anions with 9 protons in total.
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What are the number of protons in florine?
The atomic number of Oxygen is 8, which is also the number of protons.
What Atomic number of element has 9 protons and 10 neutrons?
The atomic number of an element is equal to the number of protons in its nucleus. Given that the element has 9 protons, its atomic number is 9. Therefore, the element in question is fluorine (F), which has an atomic number of 9.
What if fluorine's atomic number?
Fluorine's atomic number is 9, meaning it has 9 protons in its nucleus.
What is the atomic mass of a number that have 8 protons and 9 neutrons?
The atomic mass of an atom can be calculated by adding the number of protons and neutrons together. In this case, an atom with 8 protons and 9 neutrons would have an atomic mass of 17 atomic mass units (amu).
An element has 4 protons 5 neutrons and 4 electrons What is the atomic mass of the element?
The atomic mass of an element is the sum of its protons and neutrons. In this case, the atomic mass would be 4 protons + 5 neutrons = 9 atomic mass units.
