Seeing the number of protons, I would guess nitrogen.
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 with 7 electrons, 7 protons, and 8 neutrons is nitrogen-15 (15N).
This will be an atom with 3 protons, so it has atomnumber 3, which is one of the Lithium isotopes, having 7 neutrons (Li-10, 92%). The other naturally occurring isotope (8%)is Li-9.
7
7Li or lithium-7.The mass number of an isotope is the sum of the protons and neutrons in its atomic nuclei. The atomic number of Li is 3, so lithium-7 would have 3 protons and four neutrons.
There is no such element: an element is neutral, so it has equal numbers of protons and electrons.Impossible:2 protons 4 neutrons and 3 electrons is the IMpossible He-1 isotope with mass number 6 (=2p+4n). Helium does not accept electrons because it is noble.Possible:2 protons 4 neutrons and 2 electrons is (elemental) Helium, isotope with mass number 6 (=2p+4n)3 protons 4 neutrons and 3 electrons is (elemental) Lithium
Five protons makes this the element boron. The number of protons is the atomic number, and determines the identity of an element. This example would be the boron-12 isotope because it contains 5 protons and 7 neutrons.
A neutral nitrogen atom has 7 protons, 7 neutrons, and 7 electrons. If it is electrically charged, the number of electrons will be different. If it is an isotope of nitrogen other than the most common (N-14), the number of neutrons will be different. Protons = Atomic Number Neutrons = Atomic Mass - Protons Electrons = Protons Atomic number is the amount of protons in element.
This is an easy problem to solve if you have a Periodic Table of Elements.# protons + # neutrons = atomic number3 + 4 = 7The element with the atomic number 7 is Nitrogen.
The only element with three protons is lithium.The isotope lithium-6, has 3 neutrons and is the rarer of the two stable isotopes of lithium.Most lithium is isotope lithium-7, containing 3 protons, 3 electrons, and 4 neutrons. It makes up about 92.5 percent of the lithium found on Earth.
A positively charged ion of oxygen
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.