That depends upon what it is you wish to determine. If you wish to determine only its mass (or weight), you can use a scale. Or for greater masses, like that of stars you can measure its gravitational effects on light passing it, because gravity bends light; the amount the light is bent shows fairly accurately the gravitational pull of the star, which can then be used to determine its mass. If, however, you wish to determine its composition, well, that's another kettle of fish. There are myriad tests used by analysts and scientists to assay substances.
The element with 8 protons is oxygen (symbol O). It normally has 8 electrons as well, but in this case it has one extra electron, making it an ion. With 7 neutrons, the ion is known as oxygen-15.
Nitrogen-14 has 7 protons, 7 electrons, and 7 neutrons. Nitrogen-15 has 7 protons, 7 electrons and 8 neutrons. So, the only way they differ is in the NUMBER OF NEUTRONS.
The atomic mass of an element is the sum of the number of protons and neutrons in the nucleus of an atom. In this case, the element has 7 protons and 8 neutrons, so the atomic mass would be 7 + 8 = 15 atomic mass units.
The isotope boron-11 has 5 protons and 6 neutrons, but also 5 electrons not 8.
The isotope of oxygen, 8O17
Any element with 7 protons would be Nitrogen
The element with 7 electrons, 7 protons, and 8 neutrons is nitrogen-15 (15N).
A positively charged ion of oxygen
Elements are determined by their number of protons. Nitrogen has 7 protons but usually 7 neutrons as well. What you have here is a nitrogen isotope, an element with more or less neutrons than there are protons. Specifically, this is Nitrogen-15.
The element that has 9 protons is fluorine. Its atomic number is 9, indicating that the element has 9 protons in the nuclei of its atoms. If there are 10 electrons, then the fluorine atom has gained an electron and is now a negatively charged anion with a charge of 1-.
The element with 8 protons is oxygen (symbol O). It normally has 8 electrons as well, but in this case it has one extra electron, making it an ion. With 7 neutrons, the ion is known as oxygen-15.
7 protons 7 electrons 8 neutrons
Zugleflugglebooge
The element with 8 protons and 8 electrons is oxygen (O). The presence of 11 neutrons indicates a specific isotope of oxygen, oxygen-19.
There are 7 protrons, 7 electrons and 7 electrons in an atom of nitrogen.
I'm pretty sure its Sulfur...
Nitrogen-14 has 7 protons, 7 electrons, and 7 neutrons. Nitrogen-15 has 7 protons, 7 electrons and 8 neutrons. So, the only way they differ is in the NUMBER OF NEUTRONS.