Elements differ from one another according to the number of protons in the atoms' nuclei. Essentially, the number of protons indicate the element (not its reactivity).
11 is the atomic number of Sodium
Atomic number (in this case, 11,) is the number of protons in the element.
The 23 is telling you the atomic mass of the element (usually listed underneath the element symbol on the Periodic Table). The Atomic Mass of Sodium on the table is usually around 22.989.... so rounded to 23 for you in this question.
The atomic mass is the mass of protons plus neutrons(each about 1 atomic mass units).
Electron are so relatively light they do not significantly contribute to the mass of an element.
Number of neutrons = Mass number - atomic number = 23 - 9 = 14
'Na' is the atomic notation of sodium. Hope this helps :)
21 protons, 21 electrons and 23 neutrons
11 protons and 12 neutrons are there in Na-23.
An atom of Sodium weighs the same as 23 protons.
Vanadium has 23 protons, 23 electrons, and 28 neutrons.
Vanadium-52 has 23 protons, 23 electrons, and 29 neutrons.
atomic weight - protons = neutrons, Na-23 has an atomic weight of 23 amu, and 11 protons so 23-11=12 neutrons
Number of neutrons = Mass number - atomic number = 23 - 9 = 14
'Na' is the atomic notation of sodium. Hope this helps :)
Vanadium has an atomic no. of 23 and mass number of 51. But it has 28 neutrons and 23 electrons
8
Sodium typically has 12 neutrons in its most common isotope, sodium-23. When sodium loses an electron to form the Na+ ion, it still has the same number of neutrons due to the neutral nature of neutrons.
The iron III ion, 56Fe3+, has 26 protons, 30 neutrons, and 23 electrons. This is derived by considering the atomic number of iron (26) along with the charge of +3, which means it has lost 3 electrons.
12
C4+ would contain 24 protons and 24 neutrons but only 23 electrons.
The atomic number of sodium is 11 so it has 11 protons. For Na-23 there are 12 neutrons (23 - 11 = 12)