What is the mass of 9 protons?
Its atomic number is 9, while its atomic mass is 19 atomic mass units.
Atomic Number | Symbol | Atomic Mass (amu, g/mol) |
---|---|---|
6 | C | 12.011 |
7 | N | 14.0067 |
8 | O | 15.9994 |
9 | F | 18.998403 |
A neutral atom of fluorine (F) has 9 electrons, 9 protons, and 10 neutrons.
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
mass number, in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom.
Both protons and neutrons have a mass of 1, while electrons have almost no mass. The element hydrogen has the simplest atoms, each with just one proton and one electron.
The mass of a proton is 1. 6726×10−24 g, or about 1836 times the mass of an electron. The proton carries a positive electrical charge, that is equal in magnitude to the charge of the electron but opposite in sign. Mass of a neutron is 1.
Oxygen atoms with 9 neutrons would have a mass number of 17 (8 p+ + 9 n0), meaning they would have a mass of about 17 amu. Oxygen atoms with 10 neutrons would have a mass number of 18 (8 p+ + 10 n0), meaning they would have a mass of about 18 amu.
Answer and Explanation: The given species has 9 protons. Thus, it is fluorine (F).
Atomic Structure
Fluorine as 9 protons and 10 neutrons in its nucleus giving it an Atomic Number of 9 and an atomic mass of 19.
What isotope has 9 neutrons?
Because protons and neutrons are roughly equal in mass, an isotope's number is equal to the sum of its protons and neutrons. Therefore, oxygen 16 has 8 protons and 8 neutrons, oxygen 17 has 8 protons and 9 neutrons, and oxygen 18 has 8 protons and 10 neutrons.
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