For a neutral (uncharged) atom, the total number of electrons is equal to the atomic number (number of protons). This would be the sum of the core electrons plus the valence electrons.
the atomic core charge of an atom is the same as the number of valence electrons in the atom
the number of valence electrons plus core electrons is the atomic number
There are three main parts to an Atom. The atom comprises of protons, neutrons, and electrons. The location of each are Protons and Neutrons at the core, and Electrons in the shell **oribits around the core.** Protons and Neutrons are equal in amount unless the atom/element is an isotope.
Sodium (Na) has a total of 11 electrons in the neutral atom. 1 of these is considered a valence electron, and the other 10 are considered core electrons.See the Related Questions for more information.
All you need to determine the atomic number is the amount of protons, because it is these sub-atomic particles which enable us to identify an atom. All atoms of the same element have a unique number of protons. In this case, the atomic number is six.
the atomic core charge of an atom is the same as the number of valence electrons in the atom
Nitrogen has 2 core electrons and 5 valence electrons. If you remember, nitrogen has an atomic number of 7. When an atom is neutral it has an equal number of protons and electrons. Therfore, the overal number of electrons is 7. The definition of core electrons is, electrons in their most inner shell, On the other hand valence electrons are electrons in the outermostshell. When looking at a periodic table you see that there is a total# of 5 valence electrons. In order to figure out the core number you subtract the total number of electrons(atomic #) - Valence # of electrons. I hope this helped :)
subtract the group number from the atomic number
the number of valence electrons plus core electrons is the atomic number
18(Atomic Number:19 minus the group number:1)19-1=18 core electrons
Sulfur. It has six valence electrons. These six electrons plus the ten core electrons, 16, the atomic number (number of electrons or the number of protons [they are an equal amount because the positive and negative charges have to cancel each other out]). It is sulfur.
Take carbon as an example.Carbon, indicated by it's atomic number, has 6 electrons. The number at the top of carbon's group is the number of valance electrons. Carbon has 4 valance elections.6 total electrons - 4 valance electrons= 2 core electrons in carbon=====================(try another element yourself to see this process )
There are three main parts to an Atom. The atom comprises of protons, neutrons, and electrons. The location of each are Protons and Neutrons at the core, and Electrons in the shell **oribits around the core.** Protons and Neutrons are equal in amount unless the atom/element is an isotope.
No, it has six electrons because its atomic number is 6. Atoms are neutral, so it would need six electrons to counteract with the charge of the six protons. 2 core electrons and 4 valence electrons.
Atomic size increases from top to bottom in a group due to increase in theshieldingeffect.As you go down the group shielding from core electrons increases (as more core electrons are added), therefore valence electrons experience weaker attraction forces from the nucleus and are located further away from it, resulting in an increase in size.If you move across a period the attraction between the nucleus and valence electrons increases because the number of protons and the number of valence electrons both go up whereas the number of core electrons stays the same (shielding decreases). In this case the size decreases.
Sodium (Na) has a total of 11 electrons in the neutral atom. 1 of these is considered a valence electron, and the other 10 are considered core electrons.See the Related Questions for more information.
Sn (tin) has 50 electrons 50 protons and 69 nuetrons