7 protons, 7 neutrons and 7 electrons
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 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.
The atomic number of an element represents the number of protons in the nucleus of an atom. Since atoms are electrically neutral, the number of protons in the nucleus must be equal to the number of electrons outside the nucleus, making the atom overall neutral.
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.
Any element with 7 protons would be Nitrogen
You should understand that while neutral atoms have the same number of protons and electrons, they do not usually have the same number of protons and valance electrons, because except for hydrogen and helium, atoms also have electrons in the inner shells, which are not valance electrons. Therefore, there is no atom which has 7 protons and 7 valance electrons, although there is an element that has 7 protons, and there are several elements that have 7 valence electrons.
You should understand that while neutral atoms have the same number of protons and electrons, they do not usually have the same number of protons and valance electrons, because except for hydrogen and helium, atoms also have electrons in the inner shells, which are not valance electrons. Therefore, there is no atom which has 7 protons and 7 valance electrons, although there is an element that has 7 protons, and there are several elements that have 7 valence electrons.
The element with 7 electrons, 7 protons, and 8 neutrons is nitrogen-15 (15N).
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
7
This is copper with 12 protons and 7 electrons
Nitrogen is the 7th element in the Periodic Table. It has 7 electrons and protons.
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 valence electrons and 2 more protons than phosphorus is sulfur. Sulfur has 16 protons (2 more than phosphorus), placing it in the 16th position on the periodic table and giving it 6 valence electrons plus 2 in the 3d shell.
The element with 5 protons is boron (symbol B). Since the number of protons determines the element, the presence of 5 protons in the nucleus identifies the element as boron. The 7 neutrons and 5 electrons are additional properties of a boron atom.
The atomic number is the number of protons in an atom's nucleus. In this case, the atom has 7 protons, so the atomic number would be 7.